3D Background

[Mastermark2005]

Hello just fitted a 3d background added 4 small yellow labs and they have got behind the background.
There is mesh on the sides on the background but i still have small gaps what do i do.
Im thinking of siliconing the mesh to the glass any other way

 

[chrisatg]

You can fill the gaps with stripes of sponge, you can use filter sponge and push it between mesh and glass. The sponge will extend and fish will not force it.  See the picture which shows that kind of sponge to fill the gap.