I started adding pool salt to our pool this season, but it's unclear to me how much is required to get it to the optimum salt level, (around 2600 I believe). I've added 4 or 5 40 lb bags now and it's made it to 1200. It seems each bag increases the level by 100, if it keeps that pattern that means I need to add 14 more 40 lb bags! That seems strange to me based on what the instructions on the bag say. I was going by the Aquarite salt level reading on the display and thought maybe that wasn't accurate so I ordered the salt test kit from your site, but that is pretty close to what the box reading is. Do I just keep adding salt until I get to the proper level? This is the first season using the SWG unit so there has been no salt added in several years. Your guidance is appreciated.