Quote Originally Posted by kelemvor View Post
Twice a year? I clean my cartridge weekly during the summer and fall. Twice a week in the spring. Once a month (roughly) in the winter.
Your cartridge filter is obviously way too small for your pool. A properly sized cartridge system should only need to be cleaned once per year. Also, frequent cleaning is probably the reason you are replacing them so often. I have had my cartridges for 8+ years, clean them only once per year and the filter pressure never gets more than 1 PSI above the clean filter pressure.

I am also one of those people who would never trade a cartridge for any other filter type. I just think cleaning it once a year is far easier than backwashing many times per year (my parents had a sand filter).