it doesnt go away. i have a 75gallon tank (see sig for stock) its been setup for almost a year now and i have an algae problem. i clean my sand and plants weekly to get rid of the green algae and with in days there is a thin coat on the sand and the pants are covered. what can i do to get rid of this? i think it may have something to do with high phosphate levels in my water. how can i get this out? thanks in advanced for the help