pH Measuring Drops for Water (API Water pH Test Kit) for sale. If you want to measure the water pH, these drops work perfectly. I recently purchased it and used it only once to test the purified water (distilled water & RO water), alkaline water and tap water. I don't need them anymore. There are 2 test kits with 2 pH ranges (low pH and high pH): a. API pH Test Kit (pH Range 6.0 to 7.6), 250 Tests $15 b. API pH Test Kit (pH Range 7.4 to 8.8), 160 Tests $15 Pick-up in Burnaby area, near Canada Way and Norland/Sprott St. Please email with your phone number only if you are really serious to purchase it.