Not Sealant

[fishluvr93]

on a 2.5 gal plastic tank can you use hot glue to seal a crack?

 

[Tolak]

On hard plastic, not acrylic, I would use pvc cement. It works great on plastic filter cases, should work the same on a hard plastic 2.5 gallon.

 

[Gazoo]

You can also use Super Glue (cyanoacrylate).