Hi.\n\nI thought my problem gone for a while but it seems to be back in my display and my refugium tanks. I am using LED (10,000K) in display and CFL (6,500K) in my refugium. Nitrite, Nitrate and Ammonia are 0, PH is 8.0. Feeding Mysis shrimp once in 2 days. I am using only RO water, and i am doing WC once a week.\n\nI don't want to sound helpless, but i can't really find the root of this issue and i can only see the ChmiClean as a solution.\n\nMaybe my feeding is not right, i don't know. What is the steps i should take when feeding in details? How many hours to leave the lights on?\n\nNow i am rinsing the food with water from the tank in a cup and then putting only the food in the tank. The lights are on for 10 hours (LED - display) and 12 hours (CFL - refugium).