I have a 60 gallon tank with a 2.5 inch Bonsai Kilin Flowerhorn, 4 inch Oscar and 2 1.5 inch Blood Parrots. I will be moving them to a 100+ gallon tank soon, but for now they have plenty of space as the tank is 4 feet long. I maintain the tank very well. I vacuum the poop and extra food out daily or at least every other day because I know these fish are very "dirty" fish. I have to do at LEAST a 25% water change daily because my nitrite reading is very high. I use Prime to keep the water safe for the fish. I change enough water to bring the nitrite back down to 0. But my nitrates are always 0. This has been going on for 10 weeks. Obviously the ammonia changing bacteria is there, but not the nitrite? Does anyone know why it is taking so long? I have put extra biorings anywhere I can put them to develope more surface for bacteria to colinate. Am I going to have to continue this for ever or will it cycle? If I have to do it everyday.... that is okay, I would just like to know what to expect.