I’ve been fighting ammonia and high nitrates for almost a month. No fish had died or any of my cleaning crew. Ive done water changes, added chemicals but to no avail. Test were done with Red Sea, Hanna checkers, and a spin test at the lfs. I’ve even went as far as using a different water source to mix with and even bought already mixed at 2 different lfs. neither levels has went low enough to consider a dent made. I was told that the sand I used might be holding more in it and releasing it as I do water changes, and another possibility of cleaning chemicals my wife was using may have made its way into my tank.