Bacteria and enzymes are ready to go. Fish waste, leftover food, and dead plants quickly form a layer of mulm on the aquarium bottom. The balanced mixture of cleaning bacteria and biologically active enzymes in sera filter biostart breaks down mulm and thus initiates the further degradation of pollutants in the filter. Sera filter biostart is the ideal partner for sera bio nitrivec, which begins its work after sera filter biostart. Together, these two products ensure clear and healthy aquarium water. As a high-performance filter material, sera siporax Professional creates ideal conditions for sera filter biostart and sera bio nitrivec.