Its filling but SLOWLY. Rock and sand are in there. I probably have about 25 gallons of water in there. I made another 10 this morning before going in to work. I have a 55g drum and 30g brut can in the basement I need to turn into an RODI/salt mixing set up. I suspect it'll take a couple more days to finish filling the way things are going.
Is the tang ok? How big is he? Any idea what he has? If you need meds. I have all sorts of stuff to treat most anything. Maracyn-2, Prazipro, Cupramine (and test kit), Formalin, plus some others. Currently the only hospital tanks I have on hand is a 5gal and a 10gal tank. The 10gal is well cycled (running for some 3+ months now). Maracyn-2 is great stuff for bacterial infections. I stick to that and Prazipro. I try to only move to cupramine or formalin if those are ineffective, or if I identify the disease as requiring one of those treatments.
If a large QT isn't available.. then med dips and/or a medicated food may be worth a shot.