These glass canopies reduce evaporation and prevent fish from jumping out of the aquarium. Perfect for tropical or saltwater setups, glass canopies are essential aquarium equipment that provides a protective layer between your aquarium and light fixture. Versa-Tops glass canopies include a clear vinyl back strip to add approximately 2" to the total width. Back strip helps create a tight seal but openings can be easily cut out to accommodate heaters, filters, and other vital aquarium equipment and accessories. Versa-Top is stylish and versatile enough to match any room decor. Please click on "More Information" for tips on when to use a glass canopy.