Grow1 Black Vinyl Hydroponic Tubing, 1/2", 100' Deep Water Culture | DWC Lightly pinch the opening closed

Lightly pinch the opening closed or cover it with a small piece of plug material when the seed requires darkness

8 cubic feet of compressed PRO-MIX equals about seven cubic feet in use

Microbial inoculants

and rubber base

Grow1 Black Vinyl Hydroponic Tubing, 1/2", 100' Deep Water Culture | DWC Lightly pinch the opening closedGrow1 Black Vinyl Tubing (ID) 1 2" (OD) 5 8" 100 ft Made from strong and durable vinyl material, these tubes are available in a variety of sizes and lengths, great for use with air or water. The tube walls are thick and flexible, and you may choose between the 100% opaque black vinyl, which prevents algae growth, or the clear vinyl that allow for complete visibility. Inner Dimensions: 1 2'' Outer Dimensions: 5 8''