I am new to having a fish tank. I have a 55 Gal tank with 3 fish in it (2 silver dollars and a red fin shark). I have been keeping an eye on the chemistry as the tank cycles ( it has been set up for about 6 weeks). After my last two water changes I have seen a significnat increase in the ammonia immediatly after the water change. I thought that changing water should lower ammonia.
Any thoughts?
Any thoughts?