With a F/O tank without live sand and without live rock only fake items and non-live sand does the tank still have to cycle and what chemicals are needed just to keep the fish. I have heard several ways. Can someone tell me the correct way. Thanks
Yes, even a freshwater fish tank will go through the cycle. For fish only you don't need chemicals. Just nice clean RO/DI water, a good salt mix, and you will need a nice filter for the tank. This can be a sump, or a canister depending on your set up.