I have a Jandy Aquapure SWG and I'm just getting started with the TFP method. I've been keeping my salt at 3000-3500 ppm range according to the pool store tests. I referenced my manual and it said the optimum range is 4000 ppm so I was going to shoot for a range of 4200 ppm. Sounds really high but based on the TFP recommendations that would be about right. I'm at 3920 ppm now and was going to add another 30 lbs but the last salt I added still hasn't dissolved completely. I know there would be a saturation point but I'm sure it's MUCH higher than where I'm at now. Any thoughts on the 4200 ppm number and the undissolved salt?