Hello guys... thanks a lot for your positive comments... you're too much kind with me.
First of all... excused for my not perfect English
To Skelley and other friends

small explanation
The foam that I have used is expanded polyurethane, before I have mixed it with sands (color grey and amber), and I have put that material on one slab of plexiglass.
Subsequently I have added the natural materials and I have put a second layer to the background.
Added the roots... the plants are growing in the wall itself.
I have left to pass of the time and have put one impermeable varnish.
I have not used the silicone in order glue the background to the back glass but I have embedded it... it has been easy.
For the substrate I have used 2 kind of fine sands... and i have put it over leaves and broken roots... it's so natural... under the sands i have used a very little bit of fertilizing material... for the Crinun plants...
I promise one translation of the article soon
Thanks again...
under a picture of one Neritina Natalensis on the roots...
