Product Review

15 Packs pH Buffer Powder, Can Be Used To Make 15x250ml pH Meter Calibration Solution, Compatible And User-friendly For The Calibration Of All pH Meter/Tester, Accurate and Easy to use for Long Period.
Widely be used for testing pH balance of aquarium, pool, drinking water, RO system, Spa, hydroponics, etc

Features:
*15 packs ph calibration packets, no need to buy frequently.
*Come with a user-friendly guide, help to learn how to use and reserve, etc.
*Pre-measured exactly for accurate results.
*longer shelf life(3 years) than liquid pH calibration solution (1 year)
*Sealed with moisture-proof individual packets, convenient for reserve and carry.
*2-year manufacturer guarantee.

Easy to Use:
1.Prepare 3 x 250ml distilled water in container, and take out 1 set ph powder: 1 x pH 4.01, 1 x pH 6.86, 1 x pH 9.18.
2.Empty each packets in the 3 containers separately, you'll get 3 x 250ml pH calibration solution kit.
3.Calibrate your pH meter with the pH solution.

Package Includes:
*ph buffer powder kit
5 x pH 4.01 (Potassium Hydrogen Phthalate)
5 x pH 6.86 (Mixed phosphate)
5 x pH 9.18 (Borax)
*1x User's Guide