I started my system again after killing all my fish.  I have a total of 180 gals and grow media with expanded clay.  I did have a float system but have taken it out and replacing the liner.  During the recycling now for 5 days I have added ammonia each day and it as been consumed each day.  I have no nitrites that I can measure but after 5 or so days I decided to test for nitrates and found that…