I recently purchased one snail for my 5 gallon tank. It's doing great removing all the algae, but is leaving a lot of poop. Is this benefit for my tank in any way? Will it harm my tank?
Everything has some degree of waste, don't worry about it. Livestock poop feeds your coral. If you have too many snails, then you may have an issue; they'll starve out and die, creating a nutrient source in your system if not removed.