Long-lasting basic fertilizer for Plants: Provides nutrients for plants for 12~18 months.
2. Water De-colorization: Functions12~18 months, works especially well for removing the brown color produced by driftwood.
3. Water purification: Works as a filter material and prolongs the time between water changes to one per year. Easy to maintain.
4. Healthy gravel: Optimum particle size and hardness, easy for air exchange. Best for plant growth.
5. Natural View: Provides a natural scene.