Nutrient substrate for strong plant growth. With all essential minerals and trace elements. With fertile volcanic soil. With bio-filtering function for healthy, clear water. Actively creates soft, slightly acidic water (approx. pH 6-6.5, KH 0-2 °d). Twice-baked – lasting water stability. Ideal in combination with CO2 fertilisation. With valuable humic and fulvic acids. Ideal for plants, fish and shrimps that require soft, slightly acidic water. Suitable for bottom filters (shrimp breeding). Special nutrient formula – does not promote algae.