Tetra aquarium products are dedicated to helping seasoned hobbyists and beginners alike enjoy a successful, life-long aquatic experience. Tetra products build fish-, reptile- and pond-keeping confidence, one innovation at a time. Our complete line of Tetra nutrition, water care, filtration and aquarium products help make fishkeeping accessible to hobbyists, so they can benefit from its rewards. The Tetra Sunlight-Blocking Film is a tinted film that looks clear on aquarium glass so you can block the sunlight without blocking your view. Essential for aquariums in direct sunlight, the film helps reduce heat from direct sunlight and blocks sunlight for less maintenance. Included with the film is a squeegee and installation guide to make installation DIY-friendly. When installed properly on the outside of the aquarium, the UV film stays put. A how-to video is also available for easier setup. One film works for aquariums up to 29 gallons. For larger 55-gallon aquariums, purchase two films.