How do you find different acid levels of fruits? Does anybody know any websites or anything?

Answer 1

Use a PH tester. A pool supply company should offer such a tester.

Answer 2

Here are two great sites, the first one explaines how the acid-base diet works in the body and the second one has some great charts with all of the foods listed.
hope that helps.

http://price-pottenger.org/Articles/Acid_alk_bal.htm

http://www.trans4mind.com/nutrition/pH.html