not to mentkion it had a concentration of soap in it that can kill any fish, they use the soat to make bubbles in the drywall to make it lighter... that and the fast its made with li and chalk that can shred your lungs, but if you had water damade the moild can get into the tank and kill everything, I'd treat the tank, the empty tank with pimafix for a week do a 50 % and slwly add fish... Maybe some neons first, since neons are fragle and die quickly if something is wrong you will know right away... curel? maybe but effective. Barring that you might be looking at a compleat taire down boiling the gravel and cleaning the tank...