Originally Posted by Bombalurina
The ones here are advertised as aquarium safe as well as hamster safe. I've seen other people do it too. :) I would wait for more people to weigh in on this issue before trying it, though - what brand are you looking at?
I havent looked into it yet, I just saw the pet store had their Black Ghost Knife had all these little tubes for him. (they have ones on here??)Figured the fish might enjoy exploring as long as it wasn't too complex o.- I was wondering if it was safe to use in aquarium so the fact they have aquarium safe ones is very intriguing!