balance

Hey all. I have searched everywhere and can find no diffinitive answer to my question. There is a mountain load of informatoin on the internet about pH, but wow does it vary (as usual internet) and nothing really as specific as I need to know. I'm not sure if what I'm asking is a stupid...

-Botanicare PH up: 29% Potassium Hydroxide -Botanicare PH down: 29% Phosphoric Acid -Bluelab PH up: 35% Potassium Hydroxide -Bluelab PH down: 35% Phosphoric Acid Advanced Nutrients PH up: (?%) Pure Concentrate Potassium Hydroxide Advanced Nutrients PH down: (?%) Pure Concentrate Phosphoric Acid