Are not doing the same thing when we get live rock cultured in the ocean? What about the people who have the luck of living on the ocean that use the water for water changes? Ive seen beautiful tanks that have only had sea water added directly from the ocean. But thats just water not sand. By adding the sand i would be adding alot of biodiversity to the tank. The hermit was massive so im gonna give him to a buddy with a larger tank. He looked like a baseball on the rock work. Even if it is parasitic i have no coral or fish for it to feed on, and dont plan on adding any for a month or 2 probably late august. Just tiny traces of algae.