Can't tell you yet, since I just installed them - I put in a three stage Big Blue system the cartridges are 4.5 inches by 20 inches, I opted for the 1 inch piping. The first stage is 20 micron, second is 5 micron - both sediment type, the third is 5 micron carbon block taste, odor, chlorine (expensive - $45 bucks). The whole setup was well under $300 including tax, shipping, pvc fittings, Tapcon drill bit,screws, etc. The water doesn't seem to smell any more, probably have to wait a week to see if the toilet bowls stay clean. I got them at Northeast Supply, I don't know if they are in your neck of the woods.
But, if you are getting sand, then you probably should put a sand separator in front of the triple filter.