Hi all, I have a lot of dead algae caked up about an inch thick throughout the bottom of my pool. I need to drain my pool to pressure wash my pool. There is a drain at the bottom of my pool. How do I drain my entire pool through that drain? Do I need the pump on to drain it ? I am afraid that once the water level drops under the skimmer level, the pump will burn out. Got any recommendations and tips as to how to safely drain the pool?