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It can take a few days or longer to increase 5 PSI. I don't think anything is too odd there. I have had it for almost 2 months.

I have an above ground pool with a sand filter. My filter cracked and I replaced it with a larger filter due to a price I couldn't pass up on. I notice that after about an increase of 5 psi (from 10 - 15 PSI) the return flow is very weak and I have to backwash. It can't get pass an increase of 5...