Hi I have an adult french angel and since a couple of days I noticed that it was scratching with the live sand. Today I noticed that its right eye was blurred. In an aquarium near my house they recommend me Chem-Marine. I start the treatment today but I was wondering if it works. Also reading some articles in the site, it shows the same behavior on my angel of scratching and then eye problems and specify that could be pH problem. Today I made a test for pH and it drops from 8,4 to around 7.4-7.8. Could this be my problem?