jdhef

Well actually in my case I have an Eclipse 12 that I just bought, but didn't set up yet. It has only one filter cartridge and one Bio Wheel. The instructions say to change the cartridge every month, but I didn't know if there would be enough bacteria in the biowheel to avoid a mini-cycle.

fishchick

its been longer than a month , with my wheel and needs to change it! so messed up !