Hydrofarm Black & White Poly 10'x25' 5.5 mil Ducting and the like

and the like

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Power Si also increases nutrient absorption and bioavailability of all other nutrients by acting as an efficient transporter

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Hydrofarm Black & White Poly 10'x25' 5.5 mil Ducting and the likeThe white side is over 90% reflective for use on the walls and floor of your growing area to reflect light back to plants. The black side provides a light resistant partition. Features: Waterproof and tear resistant Use as is or cut to size Available sizes 10' x 25' 5. 5 Mil sheet 10' x 10' 5. 5Mil sheet 10' x 100' 4 Mil Roll 10' x 100' 5. 5 Mil Roll