So my tank is mostly done with it's setup, and today I picked up two keyhole cichlids (woohoo!) but I have some tanins in my water from the driftwood. I was thinking of grabbing some activated carbon for my filter to fix the issue, but I don't know how to go about using it. I have a canister filter (eheim 2213) and the carbon comes in little pellets. Do I just dump them onto the top of the other filtration? Do i put it in a bag with holes in it? I know carbon becomes useless pretty quickly so I don't think it would makes sense to just dump it in the filter... how would i get it out?
Thanks in advance
Thanks in advance