if i have to clean my glass more than once a week i know the phosphates,silicates nitrates etc.. Are on the raise which means i have to either cut down the feedings, increase water changes, change the phosban/carbon more often or increase the amount used, lower the bio-load( too many fish etc) clean the skimmer more often.........or a combination of all.
Plus 1 for new tank syndrome. My tank had brown algae at first and several months later it went down on it's own.