I bought a tusk from petco, Ya I Know, But it was a 2 1/2 incher, for only 32 bucks. It dose appear to have ick. so I put it in my hospital tank and started with a 1/2 dose of cupramine 0.15. Its doing OK and eating. But it is a wrasse, and todays the day to add the rest of cupramine for full treatment of .4 to .5 of copper. Should I add it or not???