I recently switched from liquid chlorine to SWG. Electricity is expensive in my area, so I opt for healthy sized filtration and SWG, and keep the pump run time to ~4 hrs a day. I had everything nicely balanced with my new SWG producing correct levels, then the weather changed for a few days and my solar controller decided to "extend" the pump time to heat all day. Of course with this extra pump time, the SWG ended up producing way too much chlorine. I assume the solar controller adjusting run time for heating demand is a common feature, but it doesn't seem to play well with SWG that needs predictable run time. I suppose the answer is to run the pump all day and turn the SWG output down, but I'm wondering if there are other solutions. I'd prefer to keep my nominal 4 hr run time if possible.
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