Sure do miss the days where you took your yellow 2.5 Gallon jugs for refills down to Pinch a Penny (or the Mom/Pop) pool store in Seminole/Clearwater FL...and paid about $2.75 for the entire refill. Circa 2008. I got tired of lugging/spilling jugs, so I got an SWG and use 73% CALHYPO (long shelf life, individual sealed 1 pound bags kept in a dry locker box)..... I have found in the last three years here in So. MD consistently that if I SLAM when I open the pool in April, and just keep an eye on maintaining the correct CL levels with the SWG till the Fall...my pool is perfect all season. Between the SLAM, SWG, and the Pool Cleaner...it's a breeze. I also do a SLAM before the cover goes on, and the water is clear next Spring when the cover comes off. Just have to keep an eye on the Calcium level...but so far no issues (I'm at about 325 right now). Drain and Rain over the winter keep me in good shape.