i started a 55 gallon tank a few months ago, all was well until about 10 days ago, very cloudy water, high amonia and nitrate and nitrite levels, i did a 50% water change and added ammo lock, the water looked better, not perfectly clear, levels were good, then a couple of days ago the water was cloudy, last nite i did 50% water change, the water is clear, nitrate and nitrite levels normal, amonia level is high. help, do i do another water change, add ammo lock?