just use a silicone. no need for glue. also no need for an aquaruim silicone. all silicones are safe to use in a tank just by the very nature of the product and the way that it works. most suppliers wont put "safe for aquarium use" in case you use the product and your tank bursts, no other reason than this. when using silicone you must wait until the fumes have dissipated. meaning the reaction is complete and the silicone is now sealed and safe. (_usually about 2-3 days)
errr no they're not, lots of silicons have fungisides etc and would kill fish only silicons that state 100% silicon are safe for use with fish.
Emma![]()