So I'm treating my betta Orchid with chelated copper, I know it doesn't affect the biological filter, but they say fresh carbon will remove copper. So take carbon filter out and leave PF running...my obvious question becomes.... If I take the carbon filter out won't my cycle crash?!? I don't want the carbon to remove my meds, wich my filter is NOT fresh carbon it's several months old...but I know my nitrate colony's live in there. I'm confused. Any input?