You'll need to post accurate test results -- and that probably means you'll need to purchase a Taylor K2006 or 2006C (3x the # of test for 35% more $$) -- see Amazon links in my signature.
Meanwhile you should:
#1 - Turn off your SWCG
#2 - Use bleach or trichlor in floaters for chlolrination
#3 - Add some acid to get your pH below 7.6 (but above 6.8).
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