I've had my Missisippi Map Turtle for 2 months now and they are doing really well but i've having a huge problem with brown algae. Its forming on the aquarium glass, rocks and plants. It is easy to clean off but i'm having to do this every 2 or 3 days. The algae is only forming on surfaces which the light from the lights above reach.
Does anyone know how i can get rid of this without causing any harm to the turtles. I'm desperate now. I've tried everything i can think of.

