I started a 10 Gal Saltwater Tank about 2 weeks ago i have 10 pounds of live rock and about 1" - 1 & 1/2" of live sand. I have 2 Hermit crabs 1 blue and 1 scarlet. I also have 2 Mexican Turbo Snails. I am trying to make sure the water and the tank is clean and ready for a couple of small fish. But back to what i need to find out about. A couple of days ago i started noticing these brownish egg sacks floating near the top of the water. I am not sure what they are so i started cleaning them out. But at this same time i have noticed these small clear looking insect-like creatures roaming around in the sand and on the rocks, and also on the snails. Does anyone know what these may be? Any help would be apreciated. thanxs alot.