So the last week of August I had an ammonia spike and lost everything. I did a complete water change but the ammonia stayed high. I removed 3 gallons of gravel (leaving about an inch of gravel), treated with Quick Start and Nite-out as well as added resin and an Ammonia filter to my system. 2 weeks ago the ammonia finally got to 0.25 ppm. I did another water change to try to get the remainder of the ammonia out. Now my levels are over 4. I am using a Chem test kit from API the green is 4 and my water is turning blue but there are 0 nitrites showing in the water.