Bacterial Filterclean is an effective cleaning agent for pond filters that effortlessly removes dirt build-up in the filter. It improves the water flow and increases the filter effect. This product is suitable for all types of pond filters.With only 50 ml (= 2 measuring cups) per dosage, you can clean the pond filter effortlessly and without dirty hands. Repeat the dosage every 3 weeks to achieve an optimum filter effect.Bacterial Filterclean provides you with an effective and simple solution for cleaning your pond filter.