Rainbow River is a natural gravel bottom substrate for marine and freshwater aquariums providing an aesthetically appealing multicolored dark background that enhances the coloration of fishes, sessile invertebrates, and plants. Rainbow River also provides a high surface area for biological filtration, and has a naturally high mineral content that makes it ideal for freshwater planted aquariums. Directions: Rinse Rainbow River briefly with tap water then place on the bottom of the aquarium to the desired level. Contents: Multicolored miniature natural river pebbles.
