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I have a 2 prong but can understand why a 1 prong may be better for finding a smaller spot to fit into. Mine is more of a coil lanyard type material than a rope. I don't have a strong preference for anything reef hook specific but I will mention that if you have the opportunity to use a muck stick (in that it is not prohibited), I would also carry one of those. It's perfect for dives where you don't expect current, or there will be only a little. You can stick it into the sand or select a point on a rock or dead coral to keep yourself from having to kick against the current or from drifting away. It is much easier to use and deploy/remove than a reef hook in mild to moderate current, especially if you are stopping to let others catch up or to see something of interest.