I did a quick search and didn't see any previous threads, so here's my question: I have a bunch of air plants that I would love to add to my tank. My question is whether these are safe to the crabs. The plants aren't toxic to my mammals, but I was unsure about my crabs. I realize my crabs might eventually kill them, but I have replacements. The little buggers grow so fast. I just have this great, new tank with so much space that it seems like such a waste that there's not more natural elements in it at the moment.