From the point of view of heating efficiency, no. It will heat effectively even if the pool is not totally covered, however, it will allow dirt and debris into the pool. An edge along a step or an uncovered area will provide a point at which the wind can start to worry the cover and may eventually lift it off the pool.
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Swimart Erindale
ACT-Based Daisy Expert
Committed to Quality
Daisy Pool Covers only offer energy and water efficient products so our
customers can enjoy their pools for longer.