Hydrofarm Black and White Poly APRJ1250 The meter can easily and

The meter can easily and quickly be recalibrated with digital calibration to pH 4

Easy to access toggle switch to select manual or automatic mode as well as a manual speed selector dial on the faceplate

Stack gives the plant tools to reach its full genetic potential

use the light-resistant black side

Hydrofarm Black and White Poly APRJ1250 The meter can easily andGet double the grow room assistance with this waterproof alternative to metalized film. Unroll this two sided film and custom fit your indoor garden, eliminating concerns over whether you've got afternoon facing light or a climate that supports your preferred greenery. Use the white side for walls and floors, taking advantage of the material's 90 percent reflectivity. When you want to block out light and sun, use the light resistant black side. Adding