I think I posted before, but similar aquaponic idea. The picture and video took almost year and half ago.. the plants are growing everywhere now.
My business partner's dad was a manufacturer for artificial aquarium deco 25 years ago and now he is using the similar idea made those "rocks" with special coating to prevent toxic like most of in-market one does. It makes it much lighter and easier to install on your wall without worrying it might fell and crack the tank.
sorry for the crappy phone camera ahead, hope it didn't hurt your eyes =D.
And here is a raw video from my phone.
[video]http://vid706.photobucket.com/albums/ww66/oyf709/BA743647-B612-4361-A16B-78ECE0377469-20229-00000E5FCD0C677B_zps38f6c833.mp4[/video]
Very cool idea tho for sure