I'll have to leave the Flo-Tec question to someone who knows the answer, but I just wanted to encourage you to compare the cost of a cartridge filter against a sand filter. Sand filters are the best if you have messes to clean up, and I'll put my water clarity up against any DE or cartridge filter's water anyday. (Ask Poconos and Watermom, they've both seen my pool in person!). With sand, once you get the sand in the filter, there's virtually no maintenance except an occasional backwash, and if you do have an issue with clarity, you can always toss in a handful of DE to get the clarity of a DE filter. I have just read so many posts about people having issues with having to clean/soak/replace the cartridges, that I would really think through that before you commit to one. My down the street neighbor has an Intex pool with a cartridge too, and after helping her clean up a bad algae bloom last year, swore I'd never own a cart filter.

Just a suggestion.....

Janet