Dennerle Nutribasis 6in1 - Brilliant starting conditions for luscious plant growth in any aquarium.1. Concentrated nutrient iron in depot form ensures rich green leaves2. High-quality quartz sand creates the optimum substrate climate3. Selected clay minerals in particular high-quality montmorillonite regulate the balance of nutrients: They release nutrients when needed and absorb them when there is a surplus4. Humus-rich natural peat creates a slightly acidic substrate environment with the optimum pH value and releases nutrients to the plants appropriately5. All nutrients and trace elements are in depot form with immediate and lasting effects.6. Guaranteed safe for all plants fish shrimps crayfish snails and other aquarium inhabitants.