Wide application:
Great teaching supply for lab, school, to test the solution of acid and alkali;
Testing the pH of body saliva and urine to check your health;
Check your pet dogs body acid-base;
Testing your hydroponic plant growth environment;
With your children do some science experiments about acids and bases to rich scientific knowledge;
Also apply to testing household items, drinking water, swimming pools, fish tank, aquariums, food, etc.