Bluelab® pH 7.0 Calibration Solution Size:Solution 500 ml Funnel top opening makes for

Funnel top opening makes for easy filling

Samsung white LEDs and Osram deep-red LEDs

This controller will run eight (8) HID lights at 240 V

and other unique plant growth elements found nowhere else

Simple push button CO2 calibration

Bluelab® pH 7.0 Calibration Solution Size:Solution 500 ml Funnel top opening makes forBluelab pH 7. 0 Calibration Solution "pH 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."