I am new to this site and new to an IG pool. Installed last year. I have been an AG pool owner for many years and basically used the BBB method (I do use more chlorine tabs in filter than actual bleach though). The IG pool is 14 x 28 with a vinyl liner ~14,000 gal. Gas heated, with a cartridge filter system. I live in Connecticut (hello my New England brethren ). My close friend has a new 24' round above ground pool near me and he started using Sustain pool chemicals last year and said it was a cake walk. Crystal clear all year and very little to no maintenance. His filter is DE I think. Does anyone have any feedback/comments/history with Sustain. I saw a couple posts where individual were switching from it and I have seen very little on the web. Thanks in advance!