For vigorous plant growth: live bacterial cultures make the nutrients available to the plants and promote the aquarium plants’ root development For an initial setup: spread it over the nutrient substrate or first soil layer and cover with substrate Reduces external germs and blue-green algae (cyanobacteria) colonisation. Optimises nutrient uptake of the plant roots by a bacterial breakdown of the minerals in the soil. Plants grow quicker Further benefit: mixed bacterial culture for the breakdown of organic waste at the bottom. Transforms the substrate into an additional filter Contents: 2 individually sealed metallized bags, each with 8 g mineral granulate with live bacteria cultures for soil activation in aquariums from 20-100l