While you are waiting on the K2006, get a cheap OTO/phenol red drops kit. Make sure your pH is between 7 and 8. THEN, use plain 8% household bleach to raise your chlorine to 10 ppm OR higher => you are looking for an off-scale OTO result of orange tinted yellow. Do this EVERY evening, till the algae is *all* dead.

With a typical 16x32 IG liner pool, you've got around 20,000 gallons. So you need daily doses of bleach of (4) gallons.

-- DO NOT USE OTHER CHEMICALS, ESPECIALLY ALGAECIDES! --
They may make things WORSE.

Do not test your pH when your chlorine is that high; test it BEFORE you add the evening dose, when it's medium yellow or below.

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