Want to do a quick water polishing but forgot to make up a batch of new saltwater for a water change? Well, there are a number of things you can do. For starters, you could always add a little carbon to a media reactor and place it on your system. Or, you could crank up a canister filter for some short term water filtration, but this is really just like using an oversized media reactor. If you don’t have all that extra equipment laying around, a filter sock will certainly do a bang up job of removing particles from the water, and if you don’t want to use a sock long term, just run the filter sock on the system for a few hours and then remove it. This is especially helpful if you’ve already done a water change but have leftover debris from all of the messing around in the tank.