I have moved in to a new condo. The only place for the 40 gal. tank is across the room from the picture window (facing north, no sun).

I Am now having a problem with algae that was not present before. The lights are on timer and the feeding schedule is the same as at the old place.

I assume the problem is from the tank being close to the window, has anyone used UV film on the sides of the fish tank?