Hi, was wondering if anyone has ever used quinine sulfate to treat ich or velvet on fish, and or to treat a tank. I am considering using it on a 75 gallon tank that has been used as a qt tank. It has been fallow for 4 months and when I put a new fish in it that had also gone through qt for 6 weeks, the new fish broke out with crypt. I would like to hear others thought on this drug. I have well water, so I do not use copper. Have copper in the water and trying to keep stable levels is very hard.
Laurie
Laurie