I will soon be getting another goldfish and want to be sure my QT procedure is spot on. I have never added a new fish into an existing tank, I've just gotten multiples for each new tank and treated them all at once. This is the set up so far for the QT: The bio-media are from the established filter, once I get the new fish, I will be adding one whole established filter (Fluvial EX 20 with the rest of the bio-media from the tank the fish will eventually join). The water is half fresh half from the established tank. Other than temperature, all values are reading normal on API liquid test kit. This is a 20 gal tank. My plan is to get the new fish (a small oranda >1 inch in length), do two to three rounds of prazi, and keep in the QT tank for 45-60 days. I would do 25%-50% water changes weekly when I change the big tank, and 100% change one a month. I test all my water weekly, before I change the water (so I know how much to change). Is there anything else I should do or anything I need before I get the fish.