Next time use heat & salt like the others said. It's a lot safer and easier. I quarrantine new fish in 1 of my 7 Cray tanks and automatically salt that tank (2 TBS/5 g) for 2 wks and turn the temp up to 87 or so. My Crays do great with it, they've all been through it time and again. I've got a C.quad also, he did fine with it, too 