After years of using bleach (and getting small bleach marks on my clothes) Ive decided to go the SWG route. With the current promo at Discount Salt, Im trying to decide between the Edge 40 and RJ-45. Pool is a AG 24' round, so around 13,500gal. My pump is a 2.0HP 2-speed Waterway that I generally run on low speed for about 12hrs per day.