As swimming season approaches I was debating delaying opening the pool this year. In the past I’ve followed the advice here about opening as the water temperature approaches 55 degrees before algae starts growing, and that method worked great. But that means an open pool for 2.5-3 months or so before its warm enough to swim. If I were to wait to open the pool, meaning algae would take hold, other than opening to a green pool and having to SLAM it to clear it up is there a down side to waiting that long to open?