i have a 180L salt water aquarium(my small tank), and was just wondering i have a spare external canister filter, is there any filter media i could use to just help the water out without adding nitrates/nitrites or messing anything up in it? I've read up and a lot of people say there is ways you can and it is good and others suggest not too just don't want to waste the filter even if its used as a power head? any help is appreciate thanks.
(((i have sump, skimmer, sand bed live rock everything as normal)))
(((i have sump, skimmer, sand bed live rock everything as normal)))