Anti-Algae Perforated Black Foil
Stop algae and other unwanted organism growing where you don't want them! This perforated black foil lets the water in but not the light. Essential with our Surface Blumats, also great for covering the tops of Grodan cubes and any other places where you have a moist material in light.
The foil is 4' wide - order by any amount of linear feet.