DE getting INSIDE grids

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SOLVED!

Last May I had a new multiport valve installed by an unnamed national pool supply company. They installed the wrong multiport valve on my DE filter. They put a multiport valve on that was for a sand filter instead of a DE filter. Essentially what was happening was the flow was completely backwards - pushing the water through the inside of the grids, rather than sucking it through the grids and then back to the pool. They have stepped up and are going to replace everything to include the multiport valve, entire grid and manifold system, couple bags of DE, and are even throwing in a LED Colorsplash bulb as my light had burned out. No charge of course, and what a relief to learn that I'm not crazy (at least when it comes to pool diagnostics).

Thank you!

[PoolDoc]

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Glad you solved your problem!