Malfunkshun is correct. Sigh...You got the nastiest tiger loach species there. *shakes head* Helodes are absolutely nasty devils. I remember mine biting my hands painfully that I tried to avoid them when I changed water, etc. I'd be very careful with that fish. Can't you give him another tank instead and add more tiger loaches from there? Your other fish will not fare any better as that fish continues to grow. The last time my petstore had them in stocked, they injured several common plecos there.