My tank is a 20 gallon long. It is heavily planted with hornwort, java moss, dwarf hairgrass and java fern. I have four adult White Cloud Minnows in the tank right now, and am raising 12 fry ages 6 weeks to 2 weeks in another tank which will join the adults within the next couple of months. My White Clouds eat their fry so I am sure that the 16 White Cloud Minnows will be the only fish in that 20 gallon tank. My question: Since visiting these forums I have become very interested in Cherry Shrimp. From what I have read they stay small and are peaceful creatures. Does anyone think that I can add Cherry Shrimp to a 20 gallon long with 16 White Clouds? If so, how many? I have quite a bit of java moss, and a small amount of dwarf hairgrass as well. Any comments or suggestions would be appreciated. There is no heater in the tank since I have White Clouds only, but the temperature never gets below 73 to 74 degrees. Thanks!