Variable Speed pumps are ran differently from single speed pumps. Most of us run a short, continuous cycle and the pump is mostly off for the day. With a variable speed pump, the pump is on more than it’s off. This means that on windy days, fallen debris gets collected in your skimmer and not the floor of your pool. It also means that with a chemical system, your water is continuously being sanitized day and night, and you’re much less prone to an algae breakout.