AQUARIUM GRAVEL: GloFish Aquarium Gravel creates a colorful base for all your GloFish ornaments. | RANGE OF COLORS: Choose pink, green, white, black with fluorescent highlights, or a mix of colors. | BASK IN THE GLOW: Fluorescent-accented gravel stands out under GloFish blue LED lights. | HIGHLIGHTS YOUR TANK: Use as a substrate or accent, along with GloFish plants and ornaments (sold separately). | EXPERIENCE THE GLO: GloFish fluorescent fish and products create a complete underwater fluorescent experience.