I have a tank that currently has nothing in it but some snails and bristle worms…it used to have a clown fish and a citron goby in it, but they died because of live rock I put in the tank. (The live rock had ich on it) and I have another tank with 3 clown fish, and some coral…and it is having a bad green algae problem, so I am wondering if it would be safe for the 3 clown fish if I moved some snails from the other tank into it.