2 emperor 400s and a Fluval 405. Power heads, bubblers, live plants. 75 gallon rectangle. Ammonia is always .25. Nitrite is 0 nitrate is 10. Ph is 7.4. Temp mid 70s. I have a 5 inch oranda 5 inch white fantail calico fantail. A small common a small lionhead another oranda and a 5 inch shubunkin. I can't feed em flakes. Too messy. I feed em daphnia, frozen krill frozen blood worms, romaine lettuce seaweed from omega. Lionhead and oranda pellets from hikari for wen growth. I have a variety of foods. I vacuum gravel and change water once a week and more if needed.