Ph up & down alternatives

yo i was just wondering what household products you could use to make your ph go up and down?

come on does anybody know?

Vinegar solution will bring the pH down and if you pour boiling water over egg shells, let them cool and then remove the shells, the remaining water will be a high pH and can be used to adjust. Make sure you actually check the pH of both solutions because its not an exact science.

i've used vinegar to go more acidic. and baking soda to go alkaline.