<a href=showthread.php?s=&postid=7275899#post7275899 target=_blank>Originally posted</a> by BadOleRoss
As you can see you will get any different points of view on the sametopic. I dont agree with doing hypo on a QT. The purpose of the QT is to determine if the fish is healthy so you do not introduce anything in to your MT. Hypo is a treatment and should be reserved for the fish that need it. IMO.
I'm going to agree here. A Q tank is not a hospital tank. Hypo saline conditions (1.009) kill parasites, and fish can handle it, but why treat an already stressed fish for something it doesn't have?
I don't run a Q tank full time, I don't add new fish to my tank on a weekly basis. I keep a cheap foam block style bubble filter ($10.00) in my sump. When it's time to set up the Q tank, I use water from my tank, and put the bubble filter in the Q tank. There is not a lot of feeding necessary for a single fish, and the foam filter will control water quality pretty well if you keep that in mind.
After 6 weeks in QT, if the fish looks good, into my tank he goes. At that point, you're pretty sure the fish is clean, and it should be just as safe to drop that foam bubble filter back into your sump. If something goes wrong with the fish in QT, it's far better to play it safe. Clean the bubble filter very well, and buy a new lump of foam for it.
A Q tank can be a hospital tank for treating ICH, as long as you're treating with hypo salinity (as opposed to meds), but I think it's far better to keep them seperate.