Brightwell Aquatics Reef Snow 2 L Complex of carbonate-bound, non-conservative major, minor, and trace elements in aragonite ratios, as well as marine-derived proteins and lipids in coral tissue ratios Simultaneously delivers appropriate inorganic and organic nutrients required by stony corals, both zooxanthellate and azooxanthellate soft corals, gorgonians, clams, tube worms, sponges, tunicates, and other suspension-feeding invertebrates for the growth of both soft tissue and skeletal material Ideally used at night when most corals extend their tentacles for prey-capture Does not require refrigeration