Oh, real question here. Actually no. Answered my own question first. I was going to ask if there was any sense in paying $100 extra to get the Intex SWG pump/filter instead of the regular pump/filter. But I already know that Intext filters are usually marginally sized, at best, so likely we will want to upgrade to a better filter pump. I'm not sure, but I may have something better. Pump wise anyway. A coworker had given me a used metal AGP last summer (18'), and while I won't be installing that after all, he just bought a brand new pump for it. It had a Hayward sand filter, not sure the size but it specs 100 lbs of sand, and a Hayword single speed pump with a 1.5 SHP rating. The Intex filter also seems to spec 100 lbs of sand so that's maybe equivilent but the pump is only 0.75 HP.
Anyway as to the SWG "upgrade" for $100 I checked some CircuPool SWG's. One rated for 20,000 gallons max (suggested 15,000) is 0.87 lbs/day, and one rated for 40,000 (suggested 30,000) is 1.6 lbs day, and this latter one being over the 2x rating recommended by TFP. The Intex? 11 grams/hr, or 0.58 lbs/day. In other words, good luck with that trying to maintain any sort of reasonable FC level.
So no getting the Intex SWG, even for a short usage. In fact, I'd probably order the pool without the filter/pump combo if possible. I actually looked at the spare parts page to see if I could order a complete "set" of spare parts, but that would total more than the pool including the filter, so I guess I'll order a filter I don't plan to use. Yay consumerism!
Maybe this isn't the right thread, but does it sound like the Hayword filter/pump I have from the other pool would be sufficient? If not, what's the best way to size a filter/pump combo? Even though the pool is "cheap" I'd like to get a quality pump/filter and SWG (eyeballing the CircuPool SJ-40 right now), can always transfer those from this pool to the next. Would like to add solar panels at some point, so the pump should either be sufficient for that or I could press the Intex pump into service for those perhaps? I was thinking I could lay out a 4' strip of solar panels the length of the fence on the north side (back) of our property, at 75' of length that'd be 300 square feet, or over 50% the surface area of our pool, no need to climb our roof or put holes in it.
I might need a different thread or two...