I have a 5.5 g RCS tank.It is planted. I have lost 4-5 RCS out of 20 or so. I have had them for about 4 weeks. They all didn't die at one time but slowly losing one about every week. I tested the water Ammonia-0 Ph 7.2-7.6 (hard to tell) Nitrate- 0 Nitrate 5-10 (hard to tell) Gh and Kh 50-100. I have an Orange Tank 10 g all are fine no deaths with almost the same parameters. Not sure what I am doing wrong with the Cherries. The cherry tank does have a lot of baby pond snails because of the plants I added to the tank. I feed the shrimp algae wafers, shrimp cuisine (rarely)m, and omega one veggie pellets.