Hydrofarm Black & White Grow Bags ENVIRONMENT The Bluelab pH Pen will
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Description
Hydrofarm Black & White Grow Bags ENVIRONMENT The Bluelab pH Pen will The Bluelab pH Pen will take measurements in increments of 0 Directions for Use: Use 1ml per liter (1 teaspoon per gallon) for most applications When filled with media 14" x 12" x 21