Join Date: Sep 2004
Location: San Francisco (mainland transplant from Hawaii)
Yeah those are the ohko stones. I got them at Aqua forest. I made the cave myself. I had to make it to fit the tank perfectly in order for it to work. The cave is not glued in place. The HOB filter goes into the cave to add circulation. There is also a mini pump in the cave to stir up detritus when needed.