so i have two fish in a hospital tank today is day number 8. a small yellow/blue blenny and a lubbocks wrasse. i had a small ich problem which forced me to qt them. the water params in my qt tank have been fine no amonia no nit temp around 79-80 ph 8.2 -8.3 i have done three water changes the biggest just a few minutes ago when i noticed both fish struggling to breathe and the wrasse on the top of water sucking air. the tank is medicated with copper and prazi pro, the fish have been fine till just a few minutes ago, any advice or help please