I read an article saying that someone had successfully kept a pair of convicts with a hairy puffer. I had an extra pair and gave it a shot. After watching for an hour everything seemed fine. Went out for a smoke, came back and there was only half of one convict left. It was in a 55 gallon. These hairy puffers are sneaky bandits. It has not gone after any malaysian trumpet snails that I have seen so that is definitely a cheap option for a planted tank and they do a good job keeping my glass and surfaces clean. 
