krystal clear salt water system 8110 is flashing service!!

Welcome to TFP!

It's been a few years since I had an Intex SWG. But, I believe it meant that it was time to clean the cell with vinegar or diluted muriatic acid.
 
How old is it? The electrolytic plates in them only last a couple of years. You can get a new set of plates by calling Intex or putting in your model number on their website. They run $68 plus shipping. If your unit is less than 2 years old, they may replace then for free there first time.
 
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