Top 11 Best Aquarium Silicone – Reviews and Guide 2023

 Aquarium silicone is a sealant designed to repair small leaks, cracks and fish tank construction. Choosing the Best Aquarium Silicone is vital for your fish health and tank strength.

We’ve reviewed 11 different silicone sealants below to help you find the safest and most effective option for your aquarium needs. 

 

 

Comparison Table

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The 11 Best Aquarium Silicone Products Reviewed

ASI’s clear silicone sealant has been specifically formulated for aquariums, forming an airtight seal unaffected by being submerged in fresh or salt water. 

This sealant creates a bond strong enough that it doesn’t need a primer. This material will not break or shrink and provides a long-lasting seal. It can also be used vertically without worrying about flowing or sagging while it cures.

It takes between 7 to 14 days to fully cure, after which it’s non-toxic to fish. And heals clear so as not to detract from the appearance of the tank.

Since this product is 100% silicone, it is resistant to chemicals in the air and UV radiation, so it can really provide a long lasting effect. 

4.6/5 STARS

Benefits

  • Non-toxic
  • Non-slump
  • Formulated for fresh or salt water tanks
  • Value for money

Cons

  • Not for acrylic tanks
  • Leaves residue on hands
  • Takes 7 days to cure (dries in 24 hours)
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2. Aqueon Silicone Sealant

The Aqueon Silicone Sealant is a 100% non-toxic silicone option. Application is simple and easy, and it creates a high resistance, permanent seal.

This sealant is formulated for both fresh and saltwater tanks, and is durable enough that there’s little risk of cracking or shrinking over time.

The product cures clear and is a discreet option for fixing leaks or damages. However, it’s also available in the color black for a different aquarium aesthetic. 

It is strong, permanently flexible and will last a long time. It’s recommended to wait 24 to 48 hours between application and use.

4.6/5 STARS

Benefits

  • No cracking or shrinking
  • Easy to apply
  • 100% non-toxic
  • Formulated for fresh or salt water tanks
  • Clear (also available in black)

Cons

  • Doesn’t keep well
  • Strong smell until dry
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The MOMENTIVE RTV Silicone is a high quality adhesive product specifically formulated to combat extreme temperatures. It’s also suitable for various portable applications and caulking guns.

The sealant is non-toxic, not involving any poisonous dyes or content, and provides a solid bond with the glass in your tank, along with supporting the use of old silicones left in the aquarium. 

It’s a clear sealer that’s able to be used on verticals and overhead. Application is easy, quick and can be used anywhere on or in the tank.

This adhesive silicone sealant meets military standards and is USDA certified. 

4.6/5 STARS

Benefits

  • Good for vertical & overhead
  • Glues a range of materials
  • USDA certified
  • Value for money
  • Strong adhesion

Cons

  • Not specific for aquariums
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4. Loctite Clear Silicone Waterproof Sealant

This Loctite Clear Silicone Waterproof Sealant can be applied on various surfaces, such as glass, ceramic, toys, appliances and aquariums. 

This product is made of transparent silicone, creating a waterproof and protective seal. It is safe for use with saltwater or freshwater aquariums and will not crack, peel, or shrink over time.

It’s simple to apply and only takes 24 hours for the silicone to cure before your aquarium can be used again. 

4.5/5 STARS

Benefits

  • Aquarium safe
  • Glues various materials
  • No cracking or shrinking
  • 100% silicone
  • Quick to cure

Cons

  • Some reviews say bottom of tube splits if squeezed hard
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The ASI Aquarium Sealant is a relatively cheap black silicone option to help repair your aquarium. We find black silicone can hide algae much better than clear sealants can, helping maintain a clean and aesthetic tank.

ASI is a durable, fish safe choice for your aquarium. It withstands both saltwater and freshwater and won’t slump or split as it cures.

This product only takes 24 hours to dry, however around 7 days to fully cure before you can use your tank again. 

4.6/5 STARS

Benefits

  • Non-toxic
  • Non-slump
  • Formulated for fresh and saltwater tanks
  • Value for money
  • Black

Cons

  • Not for acrylic tanks
  • Leaves residue on hands
  • Takes 7 days to cure (24 hours to dry)

 

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This fish safe MarineLanf Silicone Squeeze Tube works exceptionally well compared to other clear silicones on the market. It provides a solid adhesion that dries immediately with an impressive grip, similar to rubber. 

However, it’s worth noting that this silicone is not easy to apply and requires a bit of patience and practice to make it work the way you want it too. But with the right application, this product can provide one of the most effective seals.

We believe it’s good value for the price. This silicone can be be used outside of aquarium repairs, on various materials. It’s free of toxic substances and is safe for your fish and plant life. 

4.5/5 STARS

Benefits

  • 100% clear silicone
  • Non-toxic to fish
  • Strong seal

Cons

  • Doesn’t seal plastics
  • Strong smell until cured
  • Application takes practice
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The Gorilla Clear 100 Percent Silicone Sealant Caulk is another of the best options on the market due to its ensured long-lasting performance. It’s mold and mildew resistant and is also available in a large 10oz size, for various and multiple applications. 

This sealant is versatile enough to be used for applications such as bathrooms, kitchens, doors, and windows. It dries translucent clear to prevent discoloration or distracting repairs. 

It’s 100% silicone and 100% waterproof. There’s also no risk of seals breaking, shrinking or turning yellow, regardless of whether it’s applied inside or outside. 

This product is not aquarium specific.

4.5/6 STARS

Benefits

  • 100% silicone
  • Clear or white options
  • 30 minutes water ready
  • Won’t yellow, shrink or crack

Cons

  • Not aquarium specific
  • Poor packaging of product (parts damaged)
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8. 3M Marine Adhesive Sealant 5200 Black

This 3M Marine Adhesive 5200 Sealant is a high strength formula versatile for a wide range of applications, including boats, kitchens and many surfaces. 

It’s recommended as the best option for permanent sealing of gel coat, fiberglass or wood. Once hardened and cured, it provides a waterproof and elastic bond in and out of the water. 

It is a strong and flexible polyurethane polymer that can form a robust unit. One that is capable of retaining joints and seals during swelling, vibration, shock or contraction.

This product is not aquarium specific.

4.6/5 STARS

Benefits

  • Won’t crack or peel
  • Flexible
  • Easy application
  • Black
  • Value for money

Cons

  • Takes 5-7 days to cure
  • Not aquarium specific
  • Poor packaging (damaged parts)
  • Some reviews say it doesn’t cure properly
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9. Dap 00688 All-Purpose Adhesive Sealant

 

This Dap 00688 All-Purpose Adhesive Sealant is 100% clear silicone and is used for both building and repairing aquariums. Once applied, it takes 24 hours to completely cure.

Because it’s aquarium specific, it contains toxic-free materials and is safe for your fresh and saltwater fish and plants once cured. It is completely waterproof, remains flexible and does not break or peel.

Like a lot of silicone products, the Dap sealant has strong fumes during application that should dissipate once it’s dried and cured. 

4.6/5 STARS

Benefits

  • 100% clear silicone
  • Stays flexible
  • Won’t crack or shrink
  • Non-toxic to fish when cured
  • Good adhesion

Cons

  • Only one nozzel with product
  • Strong fumes during application
  • Not able to reseal glue after use
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This aquarium grade GE 1200 Series Construction Silicone Sealant suits all types of tanks, including larger style aquariums of a hundred liters or more. 

The adhesive product is an affordable option, and cures quite quickly compared to other silicone sealants. The seal it provides is extra strong and efficient, and is specific to various aquatic environments. 

Similar to other sealants available today, this product has an unpleasant odor during application and comes with a sticky paste that could hold your hands together tightly, so wearing gloves when working is recommended to prevent this from happening. Once cured however, all fumes and stickiness are no longer an issue. 

4.6/5 STARS

Benefits

  • Quick curing
  • Aquarium grade
  • Very strong adhesion

Cons

  • Strong fumes during application
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11. Permatex 80050 Clear RTV Silicone Adhesive Sealant

Permatex 80050 Clear RTV Silicone Adhesive Sealant is well-known for being flexible, durable and lending a long lasting seal. It’s weather resistant and able to be used indoors and outdoors.

The silicone adhesive sealant is one of the most versatile choices in circulation because it can be used to repair and seal metal, plastic, vinyl and glass fabrics. It can also be used for vinyl tops and paint stripping. So whilst it can be used on aquariums, it’s a worthwhile investment for door frames, roofs and trimmings as well.

4.6/5 STARS

Benefits

  • General purpose sealant
  • Bonds many materials
  • Flexible

Cons

  • No aquarium specific
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How to Use Aquarium Silicone Sealant?

Best Aquarium Silicone

It’s always a good idea to refer to each silicone aquarium sealant’s specific instructions before attempting to apply it. Although it’s true that they’re all used in basically the same way, it’s important to understand how long each sealant will take to fully cure. 

Don’t use the aquarium before it is ready and cured otherwise the water may be adversely affected. These products are non-toxic and safe for your fish, but only after they have dried and had the right amount of setting time.

Silicone adhesive should be applied as soon as you recognise leaks or damages in your aquariums, to prevent any danger to your aquatic life. It can also be used to glue various decorations for tanks, plants and stones on the aquarium glass. 

A General Step-By-Step Method on How to Seal a Corner Leak with Silicone.

1. Completely empty the aquarium.

2. Use a razor blade to remove as much old silicone as you can. When applying the new silicone, you want it to come into contact with only the glass, so the bond can be stronger and more effective.

3. Clean the surface and brush with fine-grit sandpaper. This slightly stiffens the surface and forms a stronger grip.

4. Make sure everything is completely dry before continuing.

5. Use a silicone gun to apply a new layer of silicone inside the edges. Use duct tape or clamps to hold everything in place while it heals.

6. Smooth the silicone along the seams with your finger to remove any excess.

7. Allow the silicone to harden for the period of time recommended by the manufacturer.

This general method can be adapted for some different situations.

For example, if you notice that there is a chip causing a leak, it is not necessary to replace the entire seam. Drain the aquarium a few inches below the chip. Clean broken glass with gloved fingers, then use fine sandpaper. Insert the silicone into the chip with a small piece of glass of similar size. Cover with wax paper and use masking tape to hold it in place until the silicone hardens. Fill the tank back up and it’s ready to go again.

Regardless of how you’re using the silicone sealant however, remember to let it harden completely before putting it in the water.

 

How to Remove Aquarium Silicone from Glass?

The first and easiest method to remove silicone from the glass is to use a razor blade and simply scrape it. 

If you need to remove silicone from a larger area or if you are trying to remove it from the corner seam, we recommend using a heat gun or hairdryer to blow hot air along the seam. Hairdryers will work but might take slightly longer. 

Once the silicone is heated and more flexible, use a razor blade to scrape it. It is important not to heat it to the point it starts to melt. You just want it to be a little more flexible, so it’s easier to remove. You can use a utility knife to split the corner if you’re taking everything apart. After removing as much as you can, use a rough sponge to get rid of any excess silicone.

 

Frequently Asked Question About Best Aquarium Silicone

What is the use of silicone sealant?

  • Silicones are an excellent sealant that can be used to repair cracks or leaks in your aquarium glass. They are waterproof, non-toxic, flexible and durable. You can also use them to repair other household items.

 

What kind of silicone is safe for aquariums?

  • 100% silicone is completely safe for aquariums as long as there are no sneaky additives; if it’s marked as pure silicone, it is safe. 

 

How to use silicone sealant on your aquarium?

  • Make sure you’ve read the instructional guidelines on the tube. It will help you know how long it will take for the silicone to set. Empty your aquarium completely. If you apply silicone sealant to broken glass, make sure it is clean. It should only come into contact with the crystal and nothing else. Don’t rush it and give it plenty of time to dry and cure.

 

Video Guide About How to Choose Best Aquarium Silicone

 

 

 

Final Comments

Silicone is arguably the most effective and safest adhesive to use in an aquarium, due to its durability and lack of toxic substances that could harm your fish and plant life. We’ve reviewed the Best Aquarium Silicone options that’ll create long-lasting seals to offset any damages and leakages in your tanks.

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[Latest 2023] Top 7 Best HOB Protein Skimmer For Saltwater Marine, Reef Tanks

[Latest 2023] Top 7 Best HOB Protein Skimmer For Saltwater Marine, Reef Tanks

Reef tanks and marine aquariums are some of the most fascinating microsections on Earth where we can observe these tiny fish and corals and other creatures at any time of the day or night.

Dirty your aquarium is nothing new, but you must take measures to ensure that the aquarium water is cleaned perfectly.

Comparison Table

CustomSiteStripe ImageTitleReviewBuy
Top PerformanceReef Octopus Classic 100 HOB Protein Skimmer4.5/5.0Check Price
cheapestCoralife Super Skimmer With Pump3.9/5.0Check Price

Anyone who owns a reef aquarium knows that a protein skimmer is important for maintaining good water quality. No serious reef keeper would be without a protein skimmer.

But what if you don’t have a container or space under your tank for a protein skimmer? The good news is that there are Hang On Back (HOB) protein skimmers that are easy to install and don’t require a collection tray or can be placed underneath the aquarium.

Due to the dissolving of organic compounds in the water, it is difficult to clean the aquarium water. If it stays dirty for too long, it will be more of a problem for the inhabitants of your aquarium.

It is the reason why you should now buy the best HOB protein skimmer to remove organic matter. These machines use air bubbles to ensure that you get cleaner aquarium water every time.

The bright colors, fascinating shapes and unique creatures that make up our saltwater fish tanks are unlike any other type of aquarium.

And in order for our seawater aquariums to thrive, we need special equipment.

Familiar things like filters and water pumps are needed, but some lesser known things like protein skimmers are also necessary for a truly healthy and happy marine aquarium.

 

Top 7 Best Hang On Back Protein Skimmers For Aquariums

Today there are many hanging protein skimmers, but not all of them will help you get rid of dissolved organic compounds. It’s the reason why you need to find the best HOB protein skimmer for your aquarium.

Think about things like the type of aquarium you own, the capacity of the skimmer, the settings, the brand and the maintenance process. Consider choosing a model that will keep you having fun by keeping the aquarium water clean. There is no need to have a model that offers long-term performance.

 

Best HOB Protein Skimmer Reviews

1. AquaMaxx HOB-1.5 Hang On Back Protein Skimmer

Best HOB Protein Skimmer

This model is often considered a superior model due to its powerful submersible pump and sensitive collection cup. These are two important features that you may always want to consider when you want to have the best protein skimmer.

For this model, it comes with a 90 gallon capacity, making it ideal for a variety of aquariums that humans may have. It is also designed to be thin and light so you can easily fit it into a small aquarium without worrying about it being too heavy.

The model is precisely designed by the computer so that it can deliver the performance in terms of performance. You will always enjoy the kind of performance you get from such a model. It ensures that the quality of the water always remains at its best.

There is also the maintenance problem for most people who own protein skimmers. That shouldn’t be a problem if you have this model as it is made to be easy to clean.

The compact design is another great feature you will love. The manufacturer designed this model from the beginning for aquarium enthusiasts. They are always looking for a model that works really well to their advantage and that’s it. Even if it can take up less space, it is also designed to reduce noise and make the model run as efficiently as possible.

The ease of use would make you want to use it even more. The installation process is simple for your protein skimmer. In a few minutes you should be easily done with the model and it will run successfully.

Benefits

  • It’s easy to use
  • Has a compact design
  • Has great performance
  • It is easy to manipulate

Cons

  • Tends to drip more often
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2. Reef Octopus Classic 100 HOB Protein Skimmer

This is another popular type of rear-end protein skimmer you can get in the market today. If you go through multiple reviews of the same model, you will easily realize that the model has received positive reviews all over. This is because the model is efficient when it comes to a protein skimmer.

Starting with the design, the manufacturer has saved it space. This is due to the cylindrical shape that comes with the model. Keeping the design to a minimum should make it easier to use in many cases.

It only takes a few minutes to assemble this model. You shouldn’t have a problem with the installation process as it is very simple. The model is designed to filter many aquariums up to a capacity of 105 liters. You should find a model ideal for various home aquariums that most people own today.

The Aquatrance 1000 pump is impressive when it comes to performance. It will continue to work very well so that you can enjoy the model for longer.

Benefits

  • High filter capacity
  • Unique design
  • Save space
  • Excellent work for the pump

Cons

  • It has a cheap craft.
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3. Coralife Super Skimmer with Pump

Walk into a house with a reef or saltwater aquarium and you will likely find a skimmer in the house. Most people like that they have the best performance when it comes to removing organic compounds in aquarium water. It is the same that you will enjoy using this model.

The model comes with a high-quality foam fractionator. This is important to ensure that you don’t have to worry about the production of bubbles that are important to the operation of the filtration process. The pump is also designed to conserve energy so you don’t have to worry about increasing your energy bill.

The best part should be the filter capacity. It is designed to be available for different aquariums, in terms of capacity ranging from 65 liters to 220 liters. The model allows you to mount it on the crankcase or hang it on the mounting bracket.

Benefits

  • Strong needle wheel drive
  • Great bubble production
  • Simple installation
  • Impressive capacity

Cons

  • Slow customer service
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4. Bubble Magus QQ1 Hang On Nano Protein Skimmer

The model may be small, but it will always deliver the right amount of power you need to meet the filtering needs of your aquarium. The small size is great when it comes to hanging it on your nano tank easily and conveniently. Many people would feel comfortable having this model in their home to aid in the filtration process.

The model can skim tanks up to a capacity of 25 gallons. Since it is made for nano tanks, it should be enough to handle such work.

The pump is ideal for providing the correct amount of water filtration you need for your aquarium. In addition, it is a quiet model that you can get today.

You should be aware that the model will be easy in terms of the installation part as you simply hang it on the back of the aquarium.

Benefits

  • It is easy to install
  • Powerful for its size
  • It is an affordable model
  • Faster operation

Cons

  • Low capacity when it comes to filtration.
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5. Macro aqua m-50 hang-on external protein skimmer

For the smallest protein skimmer worth investing in, look for the Macro Aqua M-50 plate.

This tiny suction cup is designed for use in aquariums up to 60 gallons in size, with a water flow of 238 GPH, making it a pretty powerful option for your small saltwater tank.

Here’s the breakdown:

  • Dimensions: 12.6 x 5.5 x 5 inches
  • Tank size: up to 60 liters
  • Additional Features: Works as a COOKING PLATE or a protein skimmer for added versatility

If you’re ready to use your protein skimmer right away, this no-prep protein skimmer is a great Macro Aqua option. You will find it effectively removes unsightly organic waste from fish and overfeeding, with an easy-to-remove catch pan for easy cleaning and maintenance.

This HOB protein skimmer is super small and fairly quiet so non-intrusive and ideal for use in smaller, tight spaces where big, noisy things can be a big hassle. It uses a needle-to-wheel impeller to drive the air-water contact and is made of very high quality material so it won’t break easily.

It’s actually quite small and incredibly easy to set up and use. Just snap it in and plug it in and let it do all the work.

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6. Coralvue technology bh-1000 octopus with external 1000 pump for aquarium filter

For the quietest and smallest HOB protein skimmer, look no further than the Coral Vue Technology BH-1000 Octopus.

It has excellent performance ratings from professionals and hobbyists alike, and it comes in a fairly small size that won’t affect your aquarium’s internal aesthetics.

Here’s the breakdown:

  • Dimensions: 19.3 x 10.6 x 9.4 inches
  • Tank size: up to 100 liters
  • Additional features: comes with external pump for filtration system

The Coral Vue Octopus is very easy to install, clean and generally maintain, making it ideal for long-time professionals and beginners alike. It doesn’t add heat to the aquarium, unlike many other models, and it just works well at a steady pace over the long run.

It is easily adjustable to meet your power needs and runs quietly in the background while providing excellent cleaning performance. It really is an obvious choice for anyone looking for a high quality two-in-one skimmer and filter pump system.

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7. Instant ocean seaclone protein skimmer

Instant Ocean SeaClone Protein Skimmer is our top recommendation for an inexpensive model that anyone can use in their aquariums up to 150 liters.

It is simple to install, easy to use and clean, and powerful enough to keep your medium sized aquarium clean and healthy.

Here’s the breakdown:

  • Dimensions: 18.5 x 6.2 x 4.5 inches (smallest model)
  • Tank size: 100 or 150 liters
  • Additional features: works in crankcase or COOKING PLATE skimmer

Instant Ocean SeaClone is an efficient machine that removes organic compounds from the aquarium quickly and efficiently. It uses a Turbo-Venturi injector system designed exclusively for the company.

The system mixes filtered water and air in the pump impeller chamber to create a swirling micro-bubble foam in the vortex reaction chamber.

The tornado effect provides the powerful skimming action that cleans and keeps your aquarium that way. This effect also provides increased gas exchange for the health of your aquarium life.

It works as a HOB protein skimmer or in the sump, which is great for versatility and is small enough not to alter the aesthetics of your aquarium.

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What is the Best HOB Protein Skimmer?

The CaralVue Technology BH-1000 Octopus appears to be a superior model from the above list. The model is impressive in so many features that would please anyone with a tank.

The top pump is important to ensure that the model continues to deliver the best performance time after time. Moreover, it is made of the important high quality acrylic material to keep your model looking strong and working longer.

 

How to Set Up a HOB Protein Skimmer?

The first thing to always do is familiarize yourself with the components of the included HOB protein skimmer. Usually, the manufacturer will send you all the accessories you need for the installation of the protein skimmer.

You will also receive a manual with the instructions and sometimes the schematics for assembling and installing that particular model of skimmer.

When assembly is complete, you can proceed to hang the model from the back of the tank using the mounting bracket. Make sure gaskets are tight so there is no water leakage.

 

How to Tune a HOB Protein Skimmer?

Most skimmers would be different in operation and would require different types of settings to work effectively. It’s about adjusting the protein skimmer.

You can also try modifying your model according to the manufacturer’s instructions. You usually have to wait up to 3 weeks before you can adjust the dials to find the optimal setting for your skimmer.

 

Conclusion

There are multiple models when it comes to the best HOB protein skimmers. This is common in every product category, but not all of them would be great. That’s why we’ve highlighted some of the best models available on the market right now.

Choosing between these models gives you the assurance that you are getting the best models of all time. You need to get the right model that always performs and keeps the aquarium water clean at all times.