No acrylic rod. I was actually able to balance the rocks ontop of eachother before I sprayed them. The spray just adds more security, and the bond is super strong.
Thank you. I keep meaning to take pictures of it. But, it is 1/2 inch black (also comes in silver) metal piping from Home Depot. You can find it in the plumbing section. I just bought a few connectors and 90* elbows, and screwed them together.
Here is the original one I made when I had my first tank and t5's
Thanks, motti.