We recently moved to a property with a salt-water pool. We were fortunate enough to find this website that has helped us tremendously after a few frustrating (and expensive) weeks trying to get help from the pool store. We recently completed a SLAM which did an amazing job clearing up the water. After finishing the SLAM, we let our chlorine level drop on it's own and turned on the SWG when it got down to 6 ppm chlorine. However, our chlorine level has continued to drop. Today it was down to 2 despite the SWG being set to 100%. We were told the SWG is 3 years old and understand they don't last all that long so we're assuming it needs replaced. We currently have a Hayward Turbo Cell-15 but wanted some more feedback before making a purchase. If spending a little more now means it will last longer, we would prefer to do that. Also, at what point does the control box for the SWG need replaced? Thank you for your help!