This is the first time I've used a quarantine tank in all the years I've kept fish. I don't know why it has taken so long but I'm finally commited. I added 12 pristellas and 3 cory cats all of which seem very healthy so far. It is extremely difficult to pic out any problems w/ the pristellas because there are so many and they move very quickly. I wanted to know if some of you just do a general parisite medication in your quarantine tank when you are adding a new school, or just keep them in quarantine and if no problems arrise assume they are clean. Thanks for your input.