I have an Intex Crystal Clear 8110 SWG. It's about 4 years old. It is no longer producing chlorine. The low salt alarm sounds about 10 minutes into the cycle. I tested salt levels with the Taylor K-1766 test kit and all levels are right where they should be. Water is crystal clear. I've heard you can get the unit tested but I don't know of any pool store near me that does that. Pool dimensions are 18x12x52 above ground. I'm just using a floater with 3" chlorine tabs for now until I figure out my problem. Thoughts? Suggestions?