No more tape! Revolutionary image enhancing solution that seals your background to your aquarium glass, resulting in a flawless, illuminated view from every angle. Non-toxic formula is easy to apply and remove. For use in aquariums, terrariums, and turtle tanks. Lasts the life of your aquarium. 1 ounce (30 ml) per tube. Each tube contains enough adhesive for a 4' x 2' (8 sq. feet) area.