Hey everyone i am new here. My Dt tank has developed Ich while my purple tang was being shipped. I had a qt already set up it is only a 10g. Tang came i bigger then i expected but was doing fine for the first few days. I did use the water from my DT to start my QT. Now my purple thing has a few white spots that I believe is ich. I have already set up a 30 gallon QT with brand new RODI water. What should i do. I went from never having Ich to now having it in two tanks. Hopefully somebody can give me some good advice.