I have a Marineland Magnum 350 canister filter, and it had the media canister, and the micron cartridge. I generally use the media canister with active carbon in it. Would I be able to toss the carbon and put in peat moss instead. With the intentions to lower my pH, or do I NEED that carbon. Reading around, I have noticed people use peat instead of carbon, and wanted to know more about it. Thanks DAN