75 gallon crashing

[Wayne]

I wouldn't treat with copper, its going to do more damage then good. Definatly if the ick-x is making things worse stop using it and let your water changes and skimmer pull it out.

If the ich isn't too bad (pic would help) then just soak the food with selcon and garlic and all the fish should be fine. A little ich after the stress of moving tanks is pretty common and should clear up by itself if you have healthy fish.

If you don't have coral you can do a hyposalinity treatment and hopefully that will help clear things up.