Why change the filter sand?
A general rule of thumb is, you should change the sand in your sand filter once every 1,5 to 2 years. Over time the sand loses its coarseness and becomes smooth and round, which makes it harder for the sand to trap smaller particles.
Apart from adding strain to the pool motor and sand filter. Dirty sand will have a huge impact on the amount of chemicals you use to keep the pool clean.
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