Planted Aquarium Substrate Y439035

Bio-Activ, nutrient-enriched gravel contains a wide variety of essential minerals including phosphorous, magnesium, potassium, copper, zinc and many more. Helps aquatic plants thrive and quickly achieve optimum growth; also contains iron, so you won’t need to add laterite. Micronutrients are slow-released over time, making Activ-Flora substrate indefinitely self-sustainable. Live heterotrophic bacteria provides instant nitrogen cycling without altering your pH. 100% natural with no artificial dyes or additives; grain size of the lake gems color blend is 3.1-6.3 mm.