Pool Chemicals Lower Alkalinity

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HELP!! extremely high ph and TA…… ANY FIX??

ii have an above ground pool, about 3500 gallons, i’ve never had a pool until now. i didn’t know much about the chemicals and stuff.. when i tested it last week the ph and alkalinity levels were too low so i used soda ash to fix the ph so the alkalinity would be fix…i didn’t know how much to add so i added a about 10 tablespoons..it didn’t do anything to the TA but it raised the ph a little bit so today i added another 10 teaspoons and about half an hour later decided to add sodium bicarbonate to increase the TA…..about 1 lb. then after wards tested the water trying to see what difference 30 mins made to the ph…the ph tab turned bright red and the TA was now perfect…i’m scared to see what the baking soda is going to do to the TA levels and how high the ph is gonna get….anyway to fix it?? please HELP!!!
i bought a chemical that comtains 90 percent sulfuric acid..it says it’s for lowering the ph levels….will this work the same as muturic [i’m not sure how to spell it] acid?

add about one quarter gallon of muriatic acid then wait i hour and re test again if still too high add a little more.WARNING. pour in about 1 inch above water surface DO NOT SPLASH ON SKIN OR CLOTHES.if this happens wash off with water immediately.if too low add some baking power this is what soda ash is. if you have more questions e mail me at jldailey2000@yahoo.com owner of pool company eleven years experince