General Hydroponics®, CALiMAGic™, 1-0-0, Calcium-Magnesium Supplement (1 Gallon) spl_hi The gel-filled pH electrode is

The gel-filled pH electrode is provided with a waterproof sleeve to protect the BNC connector

Max Coverage: 5' x 5'

Fill your reservoir with clean water before administering any nutrient or additive

Food-grade plastic

General Hydroponics®, CALiMAGic™, 1-0-0, Calcium-Magnesium Supplement (1 Gallon) spl_hi The gel-filled pH electrode isCALiMAGic is a concentrated blend of readily available calcium and magnesium. It is formulated to assist fast growing plants by preventing secondary nutrient deficiencies. CALiMAGic helps optimize plant nutrition and enhances plant growth and development while preventing blossom end rot and tip burn in many crops, such as tomatoes and lettuce as well as other calcium intensive plants.