[bulrush]

In my shrimp tanks I have olive nerites and spixi snails. The nerites are kind of drab but do a good job of eating algae. They are the best invert algae eater I have tried yet. But I like the spixis also, and the spixis multiply, but slowly. The spixi shells don't seem to wear (get white spots) like the olive nerites also. (I have relatively soft water.)