Glofish aquarium sand sets the stage for a unique aquatic experience. This sand not only provides a base for all your glofish ornaments and plants, but it also looks magical under your glofish aquarium's blue led lights. Use 1.5-2 Pounds of sand per gallon of water. Rinse sand before using. To clean your sand bed with a gravel vacuum, care must be taken to avoid removing the sand by limiting the flow rate through the siphon tube.For the best glofish viewing experience, try using a blue wavelength light, like glofish led lighting, to give a uniquely fluorescent look, particularly in low or nighttime lighting. Traditional white aquarium lights work well for daytime use. Your friends and family will love watching your glofish aquarium come alive under glofish lighting.