Hi:
I would never use the Margarita snails as part of the clean up crew. Margarita's need a water temperature far below what you would ever want to keep your fish healthy. However it looks as if several others have already pointed that out. Turbo and Nassarius snails are the better and more humane solution. Nassarius snails will borough through the substrate and Turbo's will handle the glass and rock.
I would never use the Margarita snails as part of the clean up crew. Margarita's need a water temperature far below what you would ever want to keep your fish healthy. However it looks as if several others have already pointed that out. Turbo and Nassarius snails are the better and more humane solution. Nassarius snails will borough through the substrate and Turbo's will handle the glass and rock.