I recently bought 2 decent sized turbo snails for my 29 gallon tank. I had 1 turbo snail in there for about a month and the tank isnt new. i have corals and fish in there. the first one died within 5 days and the other 8 days of purchasing them. My tank has enough algae for them to feed on because when they died there was still algae on the glass. the phosphates read zero, nitrites 0 , ammonia 0 , nitrate 0-10ppm.