Well we are in for a real treat, tomorrow night its back to 25 deg for one night then back in the 30's for lows for a couple days with a chance of 1-7 inches of snow. Would that be concern with the pool that I opened and running for the last 2 weeks? 1st time this happened. Currently run pump 6hr at night, 4-10pm and all test levels right on . After 7 years I thought I had a good handle of things?