FREE SHIPPING for all orders over $40
GroStar pH 4 Solution SDS
GroStar pH 7 Solution SDS
GroStar pH 10 Solution SDS
GroStar ORP Storage Solution SDS
Lab grade instruments designed specifically for growers!
The GS3 EC Pen includes: 2.77 EC calibration solution (50 ml bottle)
Only logged in customers who have purchased this product may leave a review.