I understand, i too am confused. I get the fish from a couple of different sources. The neons have been in the tank the longest. they were the first fish i got. My temp is around 79 roughly. I feed my fish a tetra min community mix and i feed my corys some bottom feeder pellets. They get brine shrimp and blood worms occasionally for a treat. the food is used right away. My kit doesnt check KH or GH so ill need to get a different kit. Ill post that later.