Yesterday i noticed that my coral beauty had a cloudy eye. Today when I got home I noticed that the eye had swollen and there was a little swelling of the top lip. I immediately transferred him to my QT and started treatment with Quick Cure (formalin solution). Is this the right method of treatment? I still have 2 clownfish in my main tank and they seem to be doing fine. My water is pH 8.2, SG 1.024 by refractometer, 0 ammonia, 0 nitrite, 20 nitrate.