If the old filter is working, that is, normal pressure and flow, seems to be filtering properly, no sand in the pool, leave it alone. When comes time, it has done its job and doesn't owe the pool anything.
Al
If the old filter is working, that is, normal pressure and flow, seems to be filtering properly, no sand in the pool, leave it alone. When comes time, it has done its job and doesn't owe the pool anything.
Al
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