Thanks for taking your time and answering all my questions... you are very helpful.
So, let me get this straight.... I may as well go about and buy a tank to make a qt, right? All that I have is a porqupine puffer (which is the one with the ick) a damsel, a shark egg, a choco chip star, and a green brittle star. I am confused on how this "hospital tank" should be set up. Should it be set up like my display tank, just a smaller version of it? and do I use water from my display tank? gosh, I am just confused on all of this, obviously I need a pump, but will just one pump be ok for the qt or do I need the whole set up like the display tank?and the hospital tank... does it need to be running all the time also... I am getting a lot of information on all of this, and you are helping me tremendously, but I still feel like I am in the dark about a lot of things....