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I just completed the Field Service Professional certification offered through NSPF. In the training on sand filters, it mentioned that some professionals add pea gravel prior to adding sand to protect the laterals and to "enhance the backwash cycle". I was wondering if this only applies to...

Hello, I am contemplating getting my CPO, however I would prefer a certification that teaches the TFP way to pool maintenance. I know it's been asked before but are there any types of certifications, or any other training available for those of us in the industry other than than the CPO? Thank...