I've had them accidently get dipped for a few minutes before and live. It stuns them but didn't kill them. The ones that went for 10-15 minutes didn't make it. They were astreaWe will load up on wrasse for our snail tank for sure I wonder if a light dip of kcl will hurt the snails we will try it and see what happends on a few the planaria die quick from the kcl