08-31-2012, 10:22 PM
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I would not advise hermits in a reef tank, although there are many that keep them. If they can't find enough to eat and get hungry, they will start to pick at your corals. And I think you will have a hard time with corals in a tank that has play sand as a substrate. Your going to have issues with your water. Play Sand is notorious for Silicates and Silicates are notorious for Cyano and Phosphates. I would strongly recommend against the use of Play Sand.
With that said, Blue Legged Hermits, Red Legged Hermits, Scarlet Reef Hermits to name a few, are good Reef Crabs to use.