I put three turbo snails In my tank yesterday . They immediatly went to town eating algae. Then this morning they looked like they were not moving. Now I see that they are again so they are not dead.i jus wonder if they have periods of inactivity and maybe they stay in one spot for a while sometimes. Everything seems to be fine with the water. I have read on here about how turbo snails are a hit and miss sometimes as to wether they last very long.