Splotchy and skinny fish

[fishstick3]

So I have a 29 biocube that had 3 fish( royal gramma, sailfin blenny, and 6 line wrasse) I believe the 6 line had ich and so the rest of my fish got it as well(at this time I didn't have a qt setup, believe me I learned my lesson). I set up a 10 gallon qt, put all 3 fish in and treated with cupramine as directed. Finished treatment and they all seemed clear of ick although their color didn't look so good. I used water changes and activated carbon to remove the copper, but kept them in the qt for the fallow period in the dt. It's been over a month and a half but two days ago my blenny died. My gramma still looks splotchy and my sixline is skinny. They both are eating like champs. I am wondering if this could be the residual effects of cupramine or is it something more nefarious? Any suggestions? I have moved them to a slightly larger tank with live rock and a better filtration system just in case that was the issue.ImageUploadedByTapatalk1412552678.909609.jpgImageUploadedByTapatalk1412552690.279696.jpgImageUploadedByTapatalk1412552710.401216.jpg

Sorry I couldn't get a good picture of the sixline, he is too fast

Thank you in advance
Fishstick