Has anyone used a blackout window film on an acrylic tank successfully? I have a 8x4 / 535g tank and unfortunately it is close to windows which is resulting in a ton of brown algae. I am attempting to cover the one window, but cannot cover the other. My thoughts were to use a blackout window film on the tank so that its blocks the side. I also what to add some duckweed to the tank, but don't think that will solve the problem 100%.
