I time my pump run cycle to add or subtract heat from the pool. When it is cold, I run more in the heat of the day. When it is hot, I run in the cool of the evening, but for an hour mid day to circulate some chlorine into the spa. I run the waterfall the same way to add or subtract heat and add a mid day 15 min run just to keep some chlorine in it regardless of the weather. I use the Polaris to add circulation in the pool in between, and hour here and there. The Polaris does not help the spa so I had to add that spa time.