I have had a 65 gallon saltwater Marineland reef tank. For years I have been battling hair algae, and right now a bad infestation of brown algae on my glass. It is scrapable, but the hair algae wont go away, it always comes back in a bloom, my parameters are fine, and I have been dosing Reef Elixir for months. Sometimes it goes away but it always comes back. What do I do?