You just push it directly into the clay. I suppose you could silicone it to the glass but I don't know how long it would survive like that. If you use coco fiber on top of the silicone then you would just need to find a way to secure it to the back wall to keep it up. Some kind of push pins or I think Eric was talking about sewing it in or something. I'm not a huge fan of clay but in this case it definately has the advatage of ease. I guess it all depends on your setup. If you want a simple back wall like what I did then go with the clay its cheap, easy and quick. And you can put the frogs in right away. No waiting for the fumes to disipate.





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