🌟 Elevate Your pH Game with Ease! Long-lasting solutions save you time and money! Compact packets fit anywhere, ready for on-the-go! Perfect for water, pools, aquariums, and more! Achieve precise pH readings every time! Just mix and measure for instant accuracy! Portable design Mix with 250mL water 15 packs total The ESEE 15-Pack pH Meter Buffer Solution Powder offers a user-friendly calibration solution for precise pH measurement. With 15 individual packets (5 each of 4.01, 6.86, and 9.18), simply mix with 250mL of distilled water for accurate results. Designed for portability, these packets are perfect for various applications, including drinking water, pools, aquariums, and hydroponics, making it a must-have for professionals and enthusiasts alike.