A little more info please.
-How long did you shock?
-How high was the Cl level you shocked to? You have a high CYA so your Cl would need to be higher. See 'Ben's Best Guess' chart for more info.
-Get your Cl level back up to around 10 (due to your high CYA) and get a combined chlorine and post it.
-Clearing typically means just running the filter 24/7 for a couple days (if clearing dead algae is your only problem).
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