I keep mine in a tank with Zebra danios, white clouds, gold white clouds, and tinwini danios. I keep three amano shrimps and a small bristlenose pleco in the tank as well to control algae growth. And I have three silver hatchets and three marble hatchets in the tank. The tank is planted so it provides hiding places if the CPDs get nervous, however they usually will school with the other fish. They are much feistier than I had read online and get along fine with the other fish.