I have a 4.5" royal in a 29 growout. I noticed him breathing slightly heavy a few days ago. I treated the tank with Aquari-sol. My wife did a 50% water change last night. I came in this morning to see him breathing even heavier than before. There is a EBJD that is about 1.75" that was fine through the whole thing until this morning. now he's breathing heavy too. Colors are a little washed out. To be honest I dont know what my PH before the water change. I have an AC70 for filtration and do one to two 30% water changes a week in this tank. I have been noticing a white film collecting on the glass after WC's that I have been cleaning with the mag float. Any help would be appreciated.