You have to learn to love it, I keep a nice coat of it on all my rocks and scrape the glass, and I don't have a huge problem even though the tank is directly infront of the window. If it's away from the sun you might not have a problem anyways plus like wrs said mbuna will eat some of the algae for you, if there is to much you can scrape it off or cut down on your feedings a for a couple days