These brightly colored gravels are designed to help create an underwater paradise for your fluorescent fish and stand out beautifully under blue LED lights. This gravel not only provides a base for all your ornaments and plants, but it also looks magical under your fish aquarium's blue LED lights. Gravel is available in a range of colors. Rinse gravel before using. For the best viewing experience, try using a blue wavelength light, like LED lighting, to give a uniquely fluorescent look, particularly in low or nighttime lighting. Traditional white aquarium lights (such as fluorescent or halogen lights) work well for daytime use. The fluorescent fish are born brilliant. They get their natural, vibrant color from their parents and are not injected, painted or dyed. Enhanced by a full range of aquarium kits, lighting, decor and accessories.