Evolution Aqua Pure Filter Start Gel Pond Filter Starter Bacteria - Wildlife and Fish Friendly Water Pond Bacteria Treatment for Filters and Filter Media | 2.5LThe perfect start for new pond filters Delivers a concentrated formula of live beneficial bacteria and enzymes directly to your filters. Speeds up the maturation of your filter media giving your pond and fish the very best start. Fast acting gel formula is more efficient than liquid or tablet based products The specialised gel based formula sticks directly to filter media and is the most optimal and quickest way to mature your filter media. Wildlife