Our tap water is at 1ppm. In accordance with the adivce recieved on this forum, I have been doing a 20-30% every night because our levels were at .50-.75ppm. Now they are above 1ppm, and I think it is because the tap water already has ammonia. We use some chemical that is suposed to neutralize chemicals in tap water before we put the water into the tank. I am going to buy three gallons of distilled water and do a water change tonight. What else can I do? Stupid tap water.