CoreyLynn
Aquarium Advice Apprentice
Beneficial bacteria grows mainly in your filter, although will eventually grow on decorations and gravel, therefore a water change removes the excess ammonia and nitrites from the water column leaving 0.25ppm or less to be used by the bacteria. Clean water is the best thing you can do for your fish under any circumstances.
Okay, so I've seen a few people say this and it's something I didn't know. I know I'm supposed to leave my bio wheel alone, which I do, but I still throw out my filter probably once a month. That's something I should stop doing? Should I just rinse it instead?