Coextruded NFT Layflat Film and NFT Tube WHITE OUTSIDE - BLACK INSIDE White on Black film and tube for NFT applications. Coextruded white on black 4 mil copolymer layflat sheeting and tube with U.V. Inhibitor and shrink resistance. These films have the strength of most 6 mil films.  They have zero light transmission which reduces algae growth and prevents system clogging. The white reflective exterior reduces heat buildup in the root zone, decreases the possibility of disease, and increases root growth. The NFT tube can be simply tied off on one end, blown up with a small tan, and holes burned the correct size at the proper spacing in the tube for your plants. Simple, fast, accurate and inexpensive. Algae problems and root drying are reduced to a bare minimum.