^ thats what I use as well in my 65g, I got the 36" version so it could span across the back of my whole tank. It works pretty well.
The only problem I have with burying a bubble wall is that it changes from the dense wall of small bubbles to a sparse wall of large bubbles, and I don't like that. I have mine laying just across the top of my sand it terminates under my driftwood root-cave...turns out there's a tiny hole through the driftwood where air collects and releases large bubbles....its pretty sweet
The only problem I have with burying a bubble wall is that it changes from the dense wall of small bubbles to a sparse wall of large bubbles, and I don't like that. I have mine laying just across the top of my sand it terminates under my driftwood root-cave...turns out there's a tiny hole through the driftwood where air collects and releases large bubbles....its pretty sweet
