While I'm glad that works for you, it's not a reliable method. A week can be long enough to grow a swamp that take MUCH longer to clean up than 12 hours in some pools. NOT recommended.
1. Stay away from that bogus pool guy. (Too much chlorine?? Get real!)
2. Stop using stuff that 'might' help. HEDP is a good thing, but unless you have metals, it does nothing for you.
3. Stop using chlorine + goop mixtures, like the HTH pool shock (cal hypo should be at least 68% available chlorine - otherwise, leave it on the shelf!)
4. Polyquat is good stuff . . . but it's not the best thing for cleaning a swamp, at least at first. The large doses of chlorine you need are going to destroy most of it.
5. Don't use pool store liquid chlorine, unless you are SURE it's fresh. 12.5% bleach, stored at current Chattanooga temps (>100 degrees) will be less than 5% bleach in a week. Use PLAIN 6% household bleach from an air conditioned Walmart!
Lots of people 'fight' algae, but never engage in a all-out "you die, or I die" combat. As long as you keep 'fighting' algae, it (and the pool store) wins. Pool stores make $$$$$'s from people who 'fight' algae all summer.
You have a ~13,000 gallon pool; PF:9. So, 1 gallon of plain household 6% bleach (0.5 lbs Cl2 equiv x 9 = 4.5) will add a little more than 4 ppm of chlorine to your pool. Add SIX gallons (24 ppm) this evening, and every subsequent evening, till the algae turns gray or bluish. Then, add 6 more, and brush the heck out of the pool.
Run your filter 24/7 during this whole process. Clean it as need.
And, get a good test kit -- 'guess-strips' help support the whole pool store racket, with their bogus results.
HTH 6-Way Test Kit @ Walmart
Taylor K2006A (3/4 oz bottles) @ Amazon
Taylor K2006C (2 oz bottles) @ Amazon
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