I've got cherry shrimp, but I believe shrimp will just graze on plants, the substrate, decorations, etc. They'll just cruise around all day and continually pick up little micro bits of whatever they find. Food, algae, decaying plant material. Sometimes I'll just drop a tiny bit of an algae wafer in for the shrimp (if the fish don't get it first). They won't necessarily stay on the bottom... mine are usually in the plants or on the piece of wood my java fern is tied to, within the mess of tangled roots. Sometimes (not sure what they're thinking...) I see them just running laps around the perimeter of the tank (20 gallon) down on the gravel!
Last edited by LeroyTheBetta; 05-18-2011 at 05:37 AM.