During my battle with Ich, i killed my two smallest clown loaches with a heater/circulator pump. First one swam up the intake hose and to make sure it didn't happen again, i covered the intake hose with thin sponge filter mesh held on with a hose clamp. Unfortunately there wasn't enough flow, so I started cutting little holes and slits in the material to increase the turnover. He also got sucked up and I found him in the pump... I was so upset that i was trying so hard to help them but they kept dying, and in those two's case directly because of my mistakes.