I have a Hayward sand filter with Zeobrite based on the suggestion of the PB. I talked to two builders, one suggested cartridge and one suggested Sand w/Zeo. The one that suggested cartridge is known to be more of a high volume, more chemicals kind of a company. The PB suggesting sand/zeo seemed to suggest low maintenance steps (just clorine, a puck, and weekly shock). I read tons of postings on various forums which listed the pros and cons of both. To me, cartridge made the most sense due to being on well water. I just didn't want to have the waste of backwashing the filter.
You might get through a season without backwashing but probably only if you get very little junk in the pool (leaves, dirt, etc.), you oversize the filter (which is good practice anyway), you keep the pump strainer cleaned out on a regular basis, and you use the skimmer socks. I probably have to backwash mine every four to six weeks as I don't have any of those conditions except that I keep the pump strainer cleaned out regularly.
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So, if I can get through a season with 1 2 minute backwash and get cartridge or better water filtration, then sand w/zeo would win in my book. We'll see.. I can definately understand your hesitation. Good luck with your decision.