white patches on powder blue tang

Hey guys. I'm a newbie to the forum and hope to get some help concerning my powder blue tang. Today is exactly 3 weeks hes been quarantined. We managed to get rid of the ick which presented in the first week, with FW dips and 100% WC every 2 days for the first week, as well as a CuSO4 medication. This morning I noticed some white patches ( like no pigment) close to his tail area,but on the body. The patches are not raised. Did a 100 % WC this afternoon and now noticed a patch ( outlined in white, but with color) on his upper eye. Any ideas to whether this is a fungal or bacterial infection? No chnage in his behaviour

 

some pics matey, he may have a parasite, have you live rock in the tank??