Bluelab pH 4.0 Calibration Solution Commercial Humidifier SLF-100 is effective in all

SLF-100 is effective in all phases of the growing cycle and is compatible with all nutrients

This kit has what you need to get your hydroponic system started

Brimming with the finest Earth-friendly natural nutrients that support rapid growth

OxiPhos has a dual mode of action (systemic and contact) and can be applied as a foliar spray

This premium pH acidifier allows you to reduce the pH of your nutrient solution

Bluelab pH 4.0 Calibration Solution Commercial Humidifier SLF-100 is effective in allpH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7. 0 first (buffer) then to pH 4. 0 (slope). Calibration Solution should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened."