Is Super Glue Gel Safe For Aquariums? What you Need to Know

Photo of author
Written By Fun Fish Tanks

I Love my Fishes 

Super Glue Gel is one of the most popular products used in aquariums for repairing and constructing structures, such as creating custom caves, forming coral frags, and fixing any cracks or leaks in the tank.

It is often preferred by hobbyists due to its strength, ease-of-use, and fast curing time.

But before you use this product on your aquarium, it’s important to know if Super Glue Gel is safe for aquatic life.

Is Super Glue Gel Safe For Aquariums?

Super glue is safe for aquariums as it becomes completely inactive when exposed to moisture or water.

The main ingredient in Super Glue Gel is cyanoacrylate adhesive. This substance forms a clear bond that can dry within seconds.

The glue itself is generally non-toxic when it has cured, meaning it will not release any harmful chemicals into the water once it has dried and solidified.

Despite this assurance of safety many aquarists are still concerned about using cyanoacrylate adhesive in their aquariums due to its potential risks.

Moisture renders super glue inactive in tank water; however, it can polymerize within 30 to 45 seconds.

Therefore, Super Glue Gel is both safe for aquariums and efficient as a fixative or bonding agent for any type of aquarium equipment.

What are the main risks with Super Glue Gel?

The primary concern with using Super Glue Gel in an aquarium environment is its ability to create air pockets that can trap fish or other animals.

When the glue cures, it creates an impermeable membrane that traps anything inside, causing them to suffocate or drown in oxygen-deprived waters. However, this is a very rare scenario.

Another possible risk associated with Super Glue Gel involves leaching of chemicals into the water column if too much of the product is applied at once.

This could be potentially hazardous for aquatic life if these chemicals are absorbed through their gills or skin over time. The fish could also eat them and that can be very risky.

As long as you take the necessary steps to keep any clumps of super glue out of your tank water and prevent fish from eating it, utilizing super glue in an aquarium is a safe option.

Where Should You Use Super Glue Aquarium?

Super glue is one of the strongest adhesives out there, transforming into an almost rock-solid bond. This aquarium-safe glue is ideal for certain types of decorations, although it may not be suitable for all types.

Using Super Glue, you’re able to securely attach your aquarium plants to driftwood, rocks, or other pieces of wood with glue. Or even fix broken driftwood and broken plant branches.

Here are some of the places where Super Glue is most commonly used:

  • Plants – Its difficult to keep Aquarium plants inside your fish tank. By using Super Glue, you can easily glue the plants on rocks, driftwoods and other places. This aids in your decoration efforts and helps you place the plants in any location of the tank.
  • Broken Decor – Its usual for Aquarium Decors to crack or break over time. Using Super Glue, you can easily glue the crack and fix any broken decors. Any they are actually pretty strong and can hold for a very long time.
  • Rocks to rocks – Many times you may want to glue rocks together, if you are planning on to build some creative decorations. Using Super Glue, you can easily glue those rocks and build your dream aquarium.

How to Safely Apply Super Glue to Your Aquarium?

One of the big mistakes most Fish tank owners make is that, they apply the glue on objects and almost immediately put them back to the aquarium once they feel it is bonded. This is wrong.

The first thing what you want to do is to remove the objects that you wish to use Super Glue on. You can place those objects on a clean table.

Now let the objects dry for a couple of hours. You want to make sure that the decors and objects are completely dry before applying the glue.

Additionally, you also want to clean off any dust particles or dirt from the objects as, that can affect how strong the glue will bond.

Next, you can apply the super glue and fix all the broken decors.

Once the Glue is applied, leave the objects for at least 1 to 2 hours, until the glue has been completely solidified. You can also use a clip to fixate and make the bonds stronger.

Once the drying process has been completed, you can then put the objects back into the aquarium.


In conclusion, using Super Glue Gel in an aquarium environment can be done safely as long as proper precautions are taken such as wearing protective gear when handling the product and only applying small amounts at once.

With all these measures taken into account then yes—Super Glue Gel can indeed be used safely within an aquarium setup for various projects such as fragging corals and constructing customized tanks!

Leave a Reply

%d bloggers like this: