ok i have no source of carbon in my 2250, all i have aare some type of cermic rings and a blue pad for the top of the eheim ( think its a polishing pad or somthing ) so can i get some HOB filters and set it on top of the polishing pad? i want to get some source of carbon going in my tank so help with ammonia ( even though im at 0 right now ) any ideas?
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