i would like to stick some mussel shells together wat can i use i heard that super glue would work but it is going into a brackish tank with sg of 1.010 or should i use an epoxie and if that is the case wat type would be fish and invertabrate and plant safe
As far as I know, super glue, cyanoacrylate, is perfectly fish safe. You can even use it to close incisions on a fish after surgery. Reefers use it in coral fragging. Any epoxy putty sold for reef applications should also be completely fish safe. Another possible and probably very cheap alternative would be to use aquarium safe silicone.