Have been vodka dosing in my 90 fowlr for a couple months and notice I get a white film on glass I have to scrape off like algae which I don't get anymore, well not much anyway. Any ideas. I don't have a sump. Have a dual bak pak skimmer and 110 HOB along with 125lbs live rock on two inch sand bed. Been running about a year with 9 two inch fish on the average


