Just dose your cupramine as recommended and keep the water quality in line. The fish should pull through especially since it has been eating. A pH that low is probably stressing the hell out of that fish.
I remember when I first got a calcium reactor and wasn't topping off with kalk and hooked it up the first night I was so excited I was going to have a reef! The next morning I woke up with a pH of 7.8 and I could see signs of discomfort in the fish mainly the emperor angel I had at the time.
I would really try and get that up but slowly don't shock them too much. Also I wouldn't switch to hypo after copper, SOMEONE CORRECT ME IF I'M WRONG, but isn't copper more toxic at lower salinity or is it ammonia or both?
I remember when I first got a calcium reactor and wasn't topping off with kalk and hooked it up the first night I was so excited I was going to have a reef! The next morning I woke up with a pH of 7.8 and I could see signs of discomfort in the fish mainly the emperor angel I had at the time.
I would really try and get that up but slowly don't shock them too much. Also I wouldn't switch to hypo after copper, SOMEONE CORRECT ME IF I'M WRONG, but isn't copper more toxic at lower salinity or is it ammonia or both?