1.Material:PU foam,composite PU.

2.durable,non-toxic,no element leak out,no influence on PH value of water.

3.All paints of boards are made of eco-friendly materials which will not dissolve in the water.And it's no danger if fishes chew and swallow a little.It is safe.

4.Perfect third dimension and imitating the nature living environment for fishes to provide the best view.

5.More concave places for fishes to hide out so as to reduce the conflict between fishes

6.Two pcs of the same items can be combined with the same waving borders to build up the continuum background.

7.Easy to cut ,stick on the glass by silicon glue , install and

disassemble