Digital Aid pH Calibration Solution Powder (4.00pH, 6.86pH, and 9.18pH). (1x3 Pack)(FBA)

Digital Aid pH Meter. Professional Quality Water Test Meter by Large Backlit LCD Screen. Range 0.00 to 14.0 pH. 3 Free Buffer Solution Powders. Plus get 6 more - see Promotion below.

General Hydroponics pH Control Kit

Jellas Pocket Size pH Meter Digital Water Quality Tester for Household Drinking Water, Swimming Pools, Aquariums, Hydroponics, pH Measurement for 0-14.0 pH, ± 0.1 Accuracy, 0.1 Resolution.(Yellow)

Vantacool Digital PH Meter, PH Tester with ATC,Water Quality Tester 0.01pH High Accuracy, 0.00-14.00 Measurement Range, 0.01 Resolution Measure Household Drinking Water (YELLOW)

Advanced Nutrients Bloom, Micro & Grow, Pack of 3, 1 L Each

Dr.meter 0.1pH PH002 High Accuracy pH Meter/pH Pen Tester with ATC LCD 0-14 pH Measurement Range (PH002 pH Meter for Water)

Root Farm 10101-10008 Ph Balance Down

6 in. Wide Lip Bucket Basket - Round Plant Container with Mesh Bottom - Hydrofarm HG6RDBK

General Hydroponics pH Down Liquid Fertilizer, 1-Gallon

Root Farm 10101-10010 Ph Balance up