The filter that came with the house is a Hayward C3020. It has 4 OEM 81 sq ft filters (CX580XRE).
Since I got smart enough to look (a few months ago), the pressure gauge has been at ~12 psi. The pump had been running 10 hours/day at least since November. I had no idea when the filters were last cleaned but I expected that I would see the psi creep up over time. Also, I read a few posts that said their "clean" pressure was ~20 psi. This got me worried that maybe there was a hole in the filter that was causing low pressure reading.
I just got finished cleaning the filters, and they seem like they are in good shape. No obvious hole, bands fraying but still intact. Put everything back together, and pressure now reads 9 psi.
The filters were absolutely caked with a whitish paste that I can't belive wasn't causing the pressure to increase more than a few psi. In the last couple weeks I have added:
- 29 lbs Calcium Chloride on the bottom
25 lbs Boric Acid on the bottom
2 lbs Baking Soda in the skimmer
2 lbs Borax in the skimmer
I assume that one or more of these of these got stuck in the filters and didn't dissolve. The last thing I added was the Borax and the pump ran for at least 6 hours before I started this project.
My questions are:
- Is 9 psi a normal clean pressure for this type of filter?
Is that white stuff normal? Does it just mean I didn't let the pump run long enough after adding chemicals?