Bluelab PH 4.0 Calibration Solution size:500 ml Tip: use lukewarm to warm

Tip: use lukewarm to warm water to increase the speed of expansion

Improve longevity with KCl

strap your rope hangers to your lights and hang 'em

Carbon dioxide (CO2) is a gas that fills our atmosphere

Full growth cycle support – Use from seedling through flowering and harvest

Bluelab PH 4.0 Calibration Solution size:500 ml Tip: use lukewarm to warmHigh quality calibration solutions Effective, affordable pH calibration Bluelab pH 4. 0 Calibration Solution 250 500 ml is essential for use with all Bluelab pH products. All Bluelab solutions are manufactured specifically for Bluelab products and are referenced to high laboratory standards to ensure your Bluelab products last longer and maintain accuracy. Product Features Benefits Contains 500 ml 16. 9 fl oz Boost your pH products longevity with