pH Up / Down Adjustment Simple chemicals to balance your nutrient solution to a neutral pH. pH Chems Conductivity 2.76 – HyGen $7.95 pH Buffer 4 – HyGen $7.95 pH Buffer 7 – HyGen $7.95 ES Electrode Storage – HyGen $8.95 HyGen pH Down – 250ml $9.95 HyGen pH Up – 250ml $9.95 pH Test Kit – HyGen $10.95 Bluelab Probe Care Kit – pH and Conductivity $28.95 $19.95 pH Tester Kit – HyGen $22.95
