ActivFloraÔäó Planted Aquarium Substrate is a Bio-Activ NUTRIENT-ENRICHEDÔäó gravel specially developed and suited for planted aquaria. ActivFloraÔäó gravel is naturally abundant in the trace elements that instantly provide a nutrient-rich environment for your aquatic plants to thrive and achieve optimum health and growth. Contains LIVE Heterotrophic bacteria for instant cycling of your planted aquarium.