Sup guys, okay I have ich in my tank, lost a few fish! I setup my 20 gallon for quarantine. I put my last 4 clowns and 1 dwarf lion in, I bought this treatment called COPPER POWER, had anyone used this before? My dilemma is, it says "use at 2.5 ppm copper: one fluid ounce to each 20 gallons" so...