Is Gorilla Glue Safe for Aquariums?

While Gorilla Glue is popular as an aquarium sealant, it’s also widely used as an algae remover.

It may effectively remove stubborn algae from your aquarium, but it may also harm your water quality. When used as directed, Gorilla Glue doesn’t harm your aquarium inhabitants.

So, is gorilla glue safe for aquariums?

Gorilla Glue is one of the strongest adhesives on the market and it’s safe for most applications around the home.

It’s often used for fixing leaky windows or repairing plastic containers. When used as directed on aquariums, it’s safe for your fish and other aquarium inhabitants.

However, if you use too much or it dries out, it can severely impact your fish tank’s water quality and may even kill fish and other marine animals in your aquarium.

What Is Gorilla Glue?

Gorilla Glue is a versatile glue that’s designed for fixing just about anything around the home.

It is a strong, long-lasting adhesive that bonds permanently to a variety of surfaces.

The most typical applications for gorilla glue include household projects involving plastics, wood, metal and glass.

It may also be used to bond other items to your aquarium shell or rockwork to improve the overall appearance of your marine tank.

Gorilla Glue is well-known for its strength, but it’s also known for being water-resistant and mold-resistant in some cases.

Gorilla Glue comes in two different types of containers: a squeeze bottle or a tube.

Original Gorilla Glue is made of a water-based mixture that’s safe for most marine environments including your fish tank.

Is Gorilla Glue Safe for Aquariums?

If the major component in the glue is water, then it’s safe for marine aquariums.

However, if the major element in the adhesive is petroleum distillates, then it could result in algae blooms in your tank and cause your fish to die or lose their color.

Polyurethane contains toxins that can harm your fish and other aquatic creatures in your fish tank.

Exposing these animals to this substance could result in sickness and possible death for aquarium inhabitants.

Because gorilla glue contains polyurethane, it is unsafe for aquariums and should never be used to attach items to the inside or outside of your tank for any purpose.

However, Gorilla super glue or Gorilla Wood Glue will not harm your marine aquarium inhabitants and are considered safe to use in your marine aquarium.

The major constituent in Gorilla super glue is resin and is completely water-based, making it safe for your marine aquarium.

Ethyl cyanoacrylate is a form of cyanoacrylate that is also recommended for aquariums because it is extremely safe.

Why Do You Use Gorilla Glue For Aquariums?

Repairs Underwater

If you have any novelty moving things, such as a betta fish jumping through hoops, a mermaid swimming around in your tank, or an underwater scene in your fish tank.

Gorilla glue is also useful for repairing your underwater decorations, which are underwater safe.


One of the primary reasons to aquascape your marine aquarium out of live rock is to enhance the beauty of your fish tank.

Many individuals will use the adhesive to glue live rock in their marine aquarium on top of their fish tank substrate, such as sand or gravel.

I’ve even used adhesive to glue live rock in various locations around my aquarium to enhance the decoration of my tank and make it look more natural.

Is Gorilla Glue Safe For Aquarium Plants?

Yes, it is safe for plants in your aquarium with plant food because resin and ethyl cyanoacrylate are generally safe for aquarium plants.

Because of its cyanoacrylate component, Gorilla glue is toxic to fish, so I do advise you never to use it on live rock in your marine aquarium.

This cyanoacrylate (Ethyl cyanoacrylate) is less harmful than other forms of cyanoacrylate, but it’s still toxic to fish and invertebrates.

So, as long as it is drying and out of the reach of your fish, then it’s perfectly safe.

The Risks of Using Gorilla Glue in an Aquarium

Gorilla Glue is a strong glue and bonds hard materials together.

However, because to the toxic substances in the adhesive, it is not advisable to use it on any live rock in your marine aquarium.

Furthermore, as the glue dries, it can damage the live rock and coral in your reef aquarium, permanently damaging your fish tank’s ecosystem.

For these reasons, Gorilla Glue should not be used on live rock in your marine aquarium.

If you must use Gorilla Glue in an aquarium, you should only apply it to decorations such as shells and live sand.

First, ensure that the fish tank is completely empty and completely dry before gluing the substrate or decorations to your fish tank.

Second, use the glue sparingly and keep a close eye on the tank’s water and substrate pH to ensure that the adhesive doesn’t burn the live rock and corals in your reef aquarium.

A little Gorilla Glue goes a long way.

Third, let the adhesive set for a couple of minutes before you introduce your marine aquarium’s inhabitants into the tank.

Finally, monitor your fish closely for any signs of sickness for the next few days after introducing them into the tank.

If any of them seem to be having trouble swimming or holding their breath for longer than their normal amount of time, consult an expert immediately.

How to Use Glue In An Aquarium?

Glue Plants To Rocks

Simply use Gorilla glue to adhere the decorations to your marine aquarium.

Simply attach the plants on the object you wish to glue and apply the Gorilla Glue to the plant and the object to which it is to be adhered.

Only a modest amount is necessary for most purposes, so use sparingly and watch your pH closely to ensure that you do not burn your corals or rock.

Remember to fully dry the substrate and decorations before applying the Gorilla Glue to your aquarium.

Make Use of Superglue Gel.

Since its inception, all varieties and types of plastic materials have had to undergo some kind of manufacturing procedure before they are suitable for use.

Nowadays, there are several different procedures involved in the creation of plastic products and one popular method is injection molding.

Super glue gel – revolves around the injection of a molten mixture of plastic into a mold heated to a very high temperature.

It has the same strength as plain old super glue, but lasts much longer and is only slightly less viscous than water.

This greatly simplifies the storage and transport of the glue.

When attempting to repair complex decorations, not understanding the various procedures and types of plastic used makes the whole task much easier.

Don’t Glue Underwater

When water is added to the superglue it reacts immediately and the bond becomes stronger than concrete and almost as good as steel; which is the reason that this variety is used for industrial.

As a result, the molten plastic in the mold bonds almost instantly to the solid surface and flows into the open spaces to anchor the fragments firmly together in no time.

My advise is to first remove any moisture from the crystals before using them in your aquarium.

This will aid in forming a bond that is similar to any other glue made for underwater usage.

I then wait a few days or weeks for the glue to completely cure before placing it in the water; just in case there are any latent deposits of hazardous chemicals that should be avoided.

What Kind of Glue is Safe for Aquarium Plants?

Many individuals are curious about which type of glue is safe to use for aquarium plants; which really isn’t as easy as it appears on the surface.

Because there are so many different aquarium plants on the market, there are even more varieties of glue available for each plant type.

Most glues, however, may be safely used in freshwater aquariums if the glue manufacturer specifically states that it’s safe for uses in aquariums.

Water-based glues are the safest choice because they contain no dangerous ingredients that will harm the water balance in the aquarium.

These glues often include latex or silicone and work well for sticking plants to rocks and other decor in the aquarium.

They will not, however, harm the aquatic plants, fish, or livestock in the aquarium if properly used.

Solvent-based glues are not as safe for aquarium use as water-based glues; because some of these glues have elements that end up in the water which cause undesirable chemical reactions.

Also Read: Is Glue Made from Horses?


If the major component is polyvinyl acetate, then it’s safe for use in your fishpond.

Before purchasing Gorilla glue, always read the contents list, so you know what you are purchasing.

For aquarium bonding, stick to purchasing the water-based type with a silicone or latex mixture.