Maveri9720 wrote: It is 3"-4" PVC pipe that you drill holes into for circulation and to allow fish to be able to get out if they manage to get themselves in there and then you cut the pipe down to however high you want your rocks to be above the sand. Then you take purple primer and paint/etch the PVC to give it the purple look of corraline algae to make it blend in better. I cut a couple notches in the top for the rocks to grab onto something, so they don't slide off of the PVC. Others cut 1/2 holes out of the top for the same reason.
:tongue2:
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