– Active substrate with pH buffering and binding of harmful substances. – Optimal substrate ready-to-use for aquatic flora. – 100% natural clay-based engineered substrate with Bio-filtering function. – Clearwater without discolouring effect. – Provides complete nutrient supply of macro and microelements for plants. – Designed for any water depth, including deep public aquariums. – Extreme long-term use of +10 years. It doesn’t crumble in the long run.