I recently removed the pool lights from their niches to check for algae growth. I noticed that there isn't a watertight seal around the lights when they are placed back into the niches, so this probably creates an area of stagnant water behind the lights. Can this cause an algae bloom? Or is maintaining adequate FC enough to prevent algae from growing behind the lights?
Furthermore, the tab (that the set screw is secured into) on one of the lights broke, so now the screw cannot hold the light in place. The light is just sitting in place temporarily...any suggestions on how to fix?