My 55gal SW has been running for a few weeks now. i have 45lbs of LR and about 50-60lbs of sand 1.5-2". a ton of brown algae has grown in the past few days, mainly on the LR and sand. its not growing on the sides of the tank. is there anything i can do other than not turning on the lights to stop it from growing so rampantly or is this just a normal phase for a ~month old SW tank?