My nitrites and ammonia are zero. I have trouble controlling my nitrates because my tap water has them as well but I maintain them around 40. I put a tablespoon of salt for every 10 gallons of water. My pH is around 7.5 and the water is hard. My temperature is around 77F. My water is clear and does not stink. It is a 29 gallon tank that is well planted and has 2 platys, 4 guppies, 7 adult mollies and several babies, and 2 dwarf pufferfish. I have an undergravel filter. I’ve had the tank set up with fish for six months. Thanks for your help Amber