The substrate is derived from research on aquatic plants.

Dennerle's aquatic greenhouses have developed a long-lasting mineral substrate with a very specific composition over several years of testing: DeponitMix Professional.
Nature served as their model. The high-quality, fine silica sand creates an optimal climate within the substrate. Carefully selected clay minerals regulate the nutrient supply, releasing nutrients in case of deficiencies and absorbing them in case of excess. Natural peat rich in humus creates a slightly acidic environment and breaks down nutrients, making them easily available to plants. Concentrated nutrient iron, combined with vital trace elements, ensures balanced growth and lush green leaves. A special, highly porous granule enhances the biofiltration function tenfold, resulting in improved water quality and healthier fish. DeponitMix Professional guarantees secure and vigorous rooting, even with more sensitive species. It contains no added phosphates or nitrates and therefore does not promote algae growth.