3D Aquarium Background *Item No.: *Made from eco-friendly polyurethane. No harm if the fish chews and swallows tiny materials,it will be excreted from the body. *Durable,no element leak out,non-toxic, PH neutral *Colors will not fade and dissolve in water. *Perfect 3-D and high imitation of the nature living environment bring more variable activity spaces for the fish and provide the excellent visual effect for ornamental fish. *More concavo-convex places for the fish to hide out so as to reduce the conflict among the fish. *Backgrounds can be connected together by reserved and relative jointing edges to build up a continuous background. *Easily cut or trimmed down to size with any handheld saw blade or even a utility blade. *Uses neutral silicon glue to stick backgrounds to the glass tank *Easy to clean , just use soft fabric to clean gently but no hard brush *Ideal for decorating aquariums, terrariums, the wall and the garden. *Lifetime: more than 10 years.