I am confused I think with this kit. Most 5 gallon recipes call for +/- 2 1/2 tsp. acid blend. I have done 5 gallon batches of blackberry, pineapple and mango. Today when I did mango, the initial test showed about .30. If you use 5.5 tsp to raise the acid up .15, you need a lot of acid blend to reach .60 although a pleasant tart taste had been reached long before the amount the test kit says is needed. I think I must be reading the results wrong. Maybe there is a better test kit out there.