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Is Krazy Glue Aquarium Safe?

Aquarium customization with various different types of tank decorations are becoming increasingly popular due to so many heavily customized aquarium tanks going viral on social media getting more and more people involved in the hobby.

Although we have noticed a number of different questions being asked by the community based on what you are able to add to an aquarium tank to customize it, one thing that most people seem to want to know is what you can safely use to secure their custom decorations in place.

Although we already have an article going over the best aquarium glue, we have noticed a number of people asking if krazy glue is aquarium safe or not recently.

Due to seeing so many people asking about this, we have decided to publish this article going over the topic to try and help as many of our readers as possible better understand when they can and when they can’t use krazy glue in their aquarium tanks.

Is Krazy Glue Aquarium Safe?

Krazy glue is usually considered to be an aquarium safe product provided you let the krazy glue fully cure prior to submerging it.

This is the most common mistake that we see people in the aquarium hobby make who are looking to customize their tanks as they apply their krazy glue or any other glue for that matter, leave it for an hour or so and then submerge it.

Although krazy glue is fast acting and can form a solid bond between surfaces within minutes, it can still take as much as 24 hours to fully cure.

We would always recommend that you leave your krazy glue to dry for at least 24 hours prior to submerging it in your tank to reduce the potential problems with your water parameters as much as possible.

Even then, just like all other glue products, krazy glue will slowly start to degrade at a very slow rate but this is so slow that it should not cause you any problems in a regular aquarium tank.

You also have to realize that the surface that you are applying your krazy glue to will come into play too and in some situations, some surfaces may need longer than 24 hours to fully cure but this is rare.

Is Krazy Glue Reef Tank Safe?

Although some people do use krazy glue in their reef tank without issue, reef tank setups contain highly sensitive corals and anemones and you really do have to do everything in your power to maintain steady and consistent parameters for the tank to thrive.

We know that the chances of krazy glue causing you problems in your aquarium are low but we would still recommend against using it in a reef tank due to the very small risk.

Even if you let your krazy glue fully cure prior to submerging it, the glue will start to break down, especially in a saltwater tank and this can then tweak your water parameters and cause you potential problems.

Due to some reef tank setups having very rare coral in it with the total tank setup often being over $1000 with some tanks being worth considerably more, we just don’t recommend that you use glue products that have not specifically been designed for use in aquariums in reef tanks.

Alternatives To Krazy Glue!

There are a number of alternatives to krazy glue that can also work in a standard aquarium but just like with krazy glue, we would usually not recommend that you use any of these in reef tanks either so only use them in a standard freshwater tank and be sure to let them fully cure.

The main alternative to krazy glue and by far the most commonly use glue product in the aquarium keeping hobby is gorilla glue and we have a dedicated article going over using gorilla glue in aquariums that you may find helpful.

Another alternative to Krazy glue that you are able to use for your aquarium is hot glue but this one can be hit and miss as some hot glue sticks can be toxic but we go over everything you need to know in our article on using hot glue in aquariums.

There are a number of aquarium safe silicone products on the market these days that you are able to use in your tank too. Some of these have a very long cure time though that can take around a week but our article on reducing your aquarium silicone cure time should be helpful.