Every miniature granule of Hikari Tropical Micro Pellets and Hikari Tropical Fancy Guppy is covered with a micro coating that locks the nutrition inside preventing it from being lost through dissipation. Thanks to this industry-leading technology, these soft granules do not dissolve or stain your aquarium water. Best of all they give you complete confidence your fish will get the nutrition each granule has packed inside. One more reason Hikari can offer you nothing but the best!