MAGDRL Mom
New member
Should we run the protein skimmer on a hospital tank? I left a little bit of sand in the tank (about two inches) so it would have some biology, but took the plants out of the refugium. There is a biowheel filter running on the tank because we haven't installed the sump yet. If I treat with formalin green, will it kill all the bacteria in the sand and filter, spike everything and kill the fish, or only the parasites?