My neighbor was throwing out a 20g xh tank and metal stand. The stand is the kind that can hold two aquariums, one on top of the other. The aquarium was used to keep hamsters..... Clearly, I need to reseal the tank as the little furry mammel did in fact chew on the sealant. Not a problem, easy enough... But, what about the hamster germs that are in the tank??? Is that toxic for the fish? thoughts, ideas???