cmor1701d
Aquarium Advice Addict
The crushed coral and bio balls are not helping with the nitrAte problems. But they are helping with the first 2 parts; ammonia reduction to nitrIte and nirtrIte reduction to nitrAte. If you do intend to remove the bio balls and/or the CC, do it in parts, no more than a third at a time and either after or synchronously with adding more rock (base or LR). Give the tank some time to be re-colonized by the beneficial bacteria before removing any more of the bio balls or cc. Over a period of a month or two you can get rid of both.