I'm not buying anymore mexican turbo snails I can't get them to live, on average they last 4-6 months in any of my tanks, one of my longer lived ones is dead today had him a good 8-10 months. I limit the population to about 1 per 20g, besides what they find on their own I feed nori once or twice a week, and I have other macro's in the tanks like gracielra. No meds have been dosed, no copper all the other inverts snails crabs shrimp do just fine. Yeah some hermits but in my 29g and 40g I only have dwarf blues and reds i just dont see them taking on a 2"+ snail and the latest was right side up.