Can I use hot glue to make some items stick together to form a decoration or is this toxic?
No, as hot glue will slowly dissolve into pieces that can harm fish if swallowed, or if it gets stuck in their grills or digestive system (as glue isn’t digestible).
Try using silicone, fishing line, or even super glue that has been rated for water/aquatic usage.
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Cool I’ll try out silicone then, thank you a ton!
I just avoid all of this stuff. The decorations in my tank mostly are things that came out of the actual ocean.