pH Up / Down Adjustment Simple chemicals to balance your nutrient solution to a neutral pH. pH Chems pH Down 250ml – HyGen $9.95 pH Up 250ml – HyGen $9.95 pH Test Kit – HyGen $10.95 pH Tester Kit – HyGen $22.95 pH Down 1Lt – HyGen $24.95 pH Up 1Lt – HyGen $24.95
