I just bought new filter cartridges for my pool and installed them. The old filters had been filthy and the PSI was running at 25 before I opened up the filter to replace the cartridges. After I put everything back together, the PSI is now running at 6 PSI and has been that way for the past hour.
Is this too low? I did have trouble getting the top closure plate to fit flush against the new filters. The notches just wouldn't go in all the way but as the manual said it just had to be "secure" I didn't force them in any further.