GH pH Down Pro is a premium solution for maintaining and lowering a nutrient's pH level. Acid formulated using food-grade phosphoric acid. Just add a little at a time if your nutrient pH is too high in order to lower the pH to the proper level.

pH Up is a highly concentrated premium base formula made to help maintain & increase the pH of a nutrient solution. Adjusting the pH to the optimal levels ensures your plants uptake the proper nutrients needed for all stages of growth.

NUTRI+® Phosphoric acid is a highly concentrated solution used to lower the pH level of a plant nutrient solution.

HI7031L is a premium quality 1,413 µS/cm conductivity standard that is prepared against a NIST traceable potassium chloride solution.

NUTRI+® POTASSIUM HYROXIDE is a highly concentrated solution used to raise the pH level of a plant nutrient solution.

Florasol pH4 calibration solution is for pH-meters. A monthly calibration of your equipment is essential to obtain precise results.

Florasol pH7 calibration solution is for pH-meters. A monthly calibration of your equipment is essential to obtain precise results.

Green Gold Electrode Cleaning Solution works to clean both, pH & conductivity meters. Removes both organic & inorganic deposits from meter sensors. Use monthly or as needed to refresh your meter & keep it working. Compatible with most testers.

Bluelab pH Probe KCI Storage Solution is designed to increase response time & maximize the life of Bluelab pH pens & probes. For best results, use KCI solution to store the pH pen/probe after use & hydrate monthly.

Citric Down will lower the pH level of your nutrient solution. The ideal pH for most hydroponic nutrient solutions is between 5.8 & 6.2, with some exceptions. Nutrient lockout will occur if pH levels are outside the optimal range.

Everything you need to clean, calibrate and maintain your pH probes

High quality solutions formulated for calibrating pH probes. Bluelab® calibration solutions are essential for use with all Bluelab® products.