Tetra Initial Sticks Tetra Initial Sticks provides nutrient-rich ground resulting in magnificent strong aquarium plants. Transforms gravel into fertile ground. Long-lasting nutrient base for lush aquarium plants. Ideal for setting up an aquarium. Promotes rapid plant growth. Contains valuable natural and mineral components such as humic substances clay minerals and iron. Provides plants with essential nutrients for at least 1 year without phosphate and nitrate for all freshwater aquariums. 200 g for 200 litres of aquarium water.