Algae growth is a persistent problem that attracts fungus and pests. By reflecting light away from the cubes surface the Cube Cap prevents algae growth, therefore eliminating the need for harmful pesticides and fungicides. Unlike plastic sheeting, Cube Cap’s unique, vented design allows oxygen to flow freely to the plants roots, ensuring they remain healthy. Fully reusable from crop to crop, the cap is an environmentally safe solution to pests and disease. Algae turns it green, Cube Cap keeps it clean.