A live, concentrated bacteria culture gel for use in new pond filters. This gel-based solution sticks to filter media, allowing the nitrifying bacteria it contains to rapidly colonise your filter. Once the filter media has been coated with gel, the beneficial bacteria within the gel will speed up the maturation of your filter media, while helping to convert ammonia & nitrite, resulting in less stressed fish. It helps to create a correctly balanced system that is healthier for the fish & life inside. Ideal for ponds up to 10,000 litres.