Also, since I am going bare bottom (at least that is the current plan), each rock has only points touching the glass. I read that this is a good thing as scum can't get trapped beneath them. The points don't seem to do anything to the bottom glass (I was more than a little concerned about that).
For those of you wanting a flat bottom rock, I watched an interesting video of a guy using the rough concrete on his driveway to "sand" the points off of the rock to make them sit flush to the bottom of the tank. I didn't take this route or try it, but it seemed like good information to share for those of you wanting nice sturdy bases for your rock work.
For those of you wanting a flat bottom rock, I watched an interesting video of a guy using the rough concrete on his driveway to "sand" the points off of the rock to make them sit flush to the bottom of the tank. I didn't take this route or try it, but it seemed like good information to share for those of you wanting nice sturdy bases for your rock work.