So in my last thread about cartridges I was told not to change the media because it will uncycle my tank. But, the cartridge I have is sealed shut and I can't get in it to replace the carbon (It's time to replace it.) So. I bought a kit, to make cartridges yourself.. It comes with resealable cartridges and lots of activated carbon. So first of all I have two sponges in my filter right now.. so they have gathered TONS of good bacteria. So tell me if this is a good plan to switch my old cartridge to my new one without uncycling: I'll keep the old one in the back of the filter (it's a huge filter) and then put my new one in the front. And next water change I'll take the old one out complete and hopefully with the help of the two sponges the bacteria will grow on the new one.
Good idea or no?