Here's the benefit of nerites. From what I've heard, they can only reproduce in saltwater and are -as ZTM said- great algae eaters! I have 3 in my 29 gallon myself and have -soon to be "had"- major algae issues that is being taken care of by the zebra nerites I have. Highly recommended!Snails kind of scare me right now with reproduction. I'll research that particular type though.