Algae problem

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My local pool store told me to add 2 quarts of muratic acid wait 1 hour add 10 lbs. of shock wait 4 hours. Move pump to recirculate add 4 lbs. of Phos Floc circulate 2 hours then turn pool off wait 1-3 days then vacuum to waste.Backwash/rinse then shock again to get rid of algae. Is this accurate & do I add the muratic to the skimmer or directly in the pool & keep the pump in the filter section. Thanks