Chitons arent bad, but if they happen to stick to teh glass theyre a **** to get off they hitchhike on lr sometimes, I had a reeeeel;y tinyone when I started the amntis tank, I pushed it off the glass, I expect its prob dead because of the mantis, I want to get a big one. Just FYI theyre related to snails, and move, very slowly. Ive smuggled one back from mexico before........ shhhhhhhh