Not sure where I am now. I set up my 75 FOWLR on 9/30. I didn't take my first reading until 10/3 and the ammonia was .25. All other readings were 0. I've been testing every 2 days, and since my first reading, the ammonia is at 0 and all others are 0 also. I only have 60 lbs live sand, 27 lbs LR...