The only real reason that I can see to delay opening(others will correct me if I'm wrong--I live in a part of the country where we don't close pools at all) is to make sure that there's no chance of freezing water in the pipes and pump. I suppose if you have it covered, and have large quantities of trees that shed at this time of year, you might also want to wait until most of that shedding is complete. But the flip-side to that is that the earlier you open, the less green water you're going to have to deal with, since the water has to warm up a good bit to sustain fast algae growth. By opening early, with the water temps still low, if you have green to clean up it should take less chlorine than it will if you have green AND warm water.
Janet


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Which was no fun clearing out. So now we are both fearful of ever having to do that again! by the way, are there preventative measures we should be taking to prevent algae?
