My fish have ich pretty bad, so I decided to treat them with copper. I took a 30 gallon brute trash can and filled it with 20 gallons of water from the DT. I also took out a rock from the tank and put it in there (I will toss it when I am done). I put a heater and a power head aerating the the surface. I added Coppersafe till I got to .5 am I doing everything correctly? I just want to make sure I am doing right, I have read alot about it but just thought I would make sure