Emerald Harvest Cal-Mag 2.5 Gal/9.46 L (2/Cs) ppm Pen (AAA battery included)

ppm Pen (AAA battery included)

Blended specifically to balance water-holding and air-filled capacity

90 gram tea brew packs make 3 gallons of brew

ppm 500 and ppm 700

It drives nutrients and minerals into the plant and results in healthier plants and tastier produce

Emerald Harvest Cal-Mag 2.5 Gal/9.46 L (2/Cs) ppm Pen (AAA battery included)Keep your plants productive and green with Cal Mag, a calcium and magnesium supplement from Emerald Harvest. Containing top quality ingredients, Cal Mag is designed to nourish crops with extra calcium and magnesium and create the right conditions for abundant flowering and a heavy yield. This is especially important when growing in some media, such as coco coir, but any garden can benefit. Use Cal Mag as a supplement to a base nutrient series for