Collected from the mineral-rich foothills of Mount Aso Volcano in Japan, Fluval Stratum is the ideal substrate for stimulating the growth of aquatic plants in freshwater aquariums and those featuring shrimp. Plant roots easily penetrate and spread throughout the substrate, allowing plants to obtain a variety of key, readily available nutrients that will make them flourish. The addition of Fluval Plant Micro Nutrients to Fluval Stratum will ensure a full compliment of essential macro and micro nutrients. The subtrate's light, non compacting, porous structure is also highly beneficial to nitrifying bacteria, which rapidly colonize the vast porous surface, providing optimal water quality for fish. 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 newborn shrimp with a refuge, allowing them to escape predators until they are large enough to emerge. This highly attractive substrate will not discolour water and helps control organic discolouration usually present when natural driftwood is used. How much Fluval Stratum should I use? < 45cm Tank Length = 2kg 45cm Tank Length = 4kg 60cm Tank Length= 8kg 90cm Tank Length = 12kg Fluval Plant & Shrimp Stratum Aquarium Substrate 2kg Aquarium Products.