This tiny grazer - Strombus maculatus - is a really nice choice for part of the clean up crew. Stombus snails are very active, cleaning the glass and rockwork all day long. They are rather small, no longer than a maximum half an inch in length, and often breed in our aquariums. Without predation, you can end up with a bunch of strombus to share with other hobbyists. Clear egg sacks will appear on the glass, usually with about four white or beige eggs inside. Once ready, they will emerge on their own and start looking for food. They seem to do quite well in refugiums, while not consuming your macro algae. They resemble conchs, as they are in that general family.