This natural water butt treatment is the perfect solution for keeping your water butt odour free and clean. The treatment includes a UV blocker to help stop harmful rays promoting active algae growth and the ‘scummy’ look within the water butt. This product also includes a flocculating agent which will clump debris together which will then sink to the bottom of the water butt. This treatment is made from beneficial bacteria and is completely harmless to all wildlife and the water after treatment is completely safe to use on plants. Directions for use: Add 10ml to 100 litres of rainwater. Apply once a week. 500ml will treat 5000 litres. Bottle size – 500ml.