if its blue green algae then its really a bacteria not a true algae. blue green is cause of dead spots in the tank. i fixed the little prob i had with it a few years ago by using a spray bottle on mist and sprayed under the water with H2O2 and upped circulation. circulation is the main think that will help and H2O2 is an oxidizer so it also helps with moving air to the spot to kill the bacteria. since no fish its worth a shot but yeah i would turn off lights and if its a must just use the lights in the room to see into the tank
|