Don't worry the heater's not even connected. The heater did a number on my Gulper's gut and ever since it's been disconnected. The Gulper cat survived, but has a horrible scar. Plus when I bought this stingray he had a bad burn from the LFS's heater. Got him for a steal($15) since they thought he wouldn't survive. Low and behold here is 4 month's later and still kickin. Just curious it's always had me a little worried, is his activeness something I should be worried about. Since he healed he's alway's on the move. I'm just a little worried since he doesn't seem to be growing either. I got a female at the same time and her disk size has gotten about 50% bigger since then. She also rides the powerheads, but no where as often as Lil Kahuna does.