glofish crescent aquarium kit 5 gallons, includes hidden blue led light and internal filter glofish this crescent-shaped, 5-gallon tank is made of clear, high-quality plastic and is sure to brighten any room. special additions like the black acrylic canopy with fluorescent colors provide the perfect backdrop for your the fluorescent fish. a motor-driven micro filter pulls water from the aquarium and pushes it through the filter cartridges, where the dense, dual-sided mesh catches debris and waste. 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, glofish products create a complete underwater fluorescent experience that appeals to all ages and levels of expertise.