Pool pump showing a high psi

[Watermom]

Clean them by:

Spraying them off -- NO pressure washer; no scrubbing.
Soak them in 4 gal water + 1lb TSP + 1/8 cup of bleach each time you change cartridges.
When swapping, remove from tank; drain, rinse, drain again, rinse, drain again, rinse a 3rd time; install

Rotate them regularly, with one cartridge always soaking. NEVER acid clean a cartridge unnecessarily; NEVER acid clean without using detergent (TSP) first.

(I think it was Waterbear who wrote the above. I copied it and pasted it from some notes.)

Also --- sounds like you have a suction side cleaner. Does it attach to the skimmer in some way?

[Wakkoguy]

I just got the new filter put in and the pressure is down from 30 to 10! Works great, thanks for the advice.

[PoolDoc]

New cartridge sticky (not yet checked by mods & team for errors):
http://www.poolforum.com/pf2/showthread.php?18044