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The pool should stay empty for as short a time as possible. When the pool is empty the walls are subject to relativley extreme changes in temperature, compared with the stable temperatures of water. Shrinking and expanding (with temperature changes) of the pool wall surface will result in cracking. You then face the joys and expense of repairing the cracks. The bottom line is: Empty the pool only when you need to, do whatever you intended to do while the pool is empty - and start refilling it immediately.
Just wanted to add that a pool left empty can "float"..that is to say it pops out of the ground, rising above ground level several inches or more. The ground surrounding the pool, especially if it is wet, is heavier than the pool surface, and puts pressure on the pool walls, which could cause tehm to crack, or "float" the pool. Having said that, I had my pool empty for a long time before I had it re-plastered and nothing happened to it. :)
Wiki User
∙ 8y ago
Wiki User
∙ 11y agoUntil you put water in it
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