Fluval Stratum is the ideal aquarium substrate for stimulating the growth of aquatic plants in freshwater aquariums. Plant roots easily penetrate and spread throughout the substrate allowing live aquarium plants to obtain a variety of keys readily available nutrients that will make them flourish. The addition of Fluval Plant Micronutrients will ensure a full complement of essential macro and micro. The substrate's light non-compacting porous structure is also highly beneficial to nitrifying bacteria which rapidly colonize the vast porous surface providing optimal aquarium water quality for real plants. Fluval Stratum's inherent properties will help support a neutral to slightly acidic pH ideal for most plant species and species of tropical fish or shrimp normally kept in planted aquariums. Fluval Stratum also provides new aquarium shrimp with the ideal refuge allowing them to escape predation until they are large enough to emerge into the shrimp tank. This highly attractive substrate will not discolor water and helps control organic discoloration usually presents when natural driftwood aquarium decor is used. Fluval has a wide variety of products that are perfect for your pet fish shrimp or beta fish to enjoy in any large fish tank small fish tank freshwater tank or in a saltwater tank. The Fluval Plant and Shrimp Stratum is the perfect substrate for planted aquariums and is available in multiple sizes; available as a 4.4 lb bag an 8.8 lb bag and a 17.6 lb bag.