Swell Barley Straw Pond Balls 1000ml tub. Barley Straw for Ponds to act as Pond Cleaner and Algae Treatment

Keep your pond crystal clear this season with Swell UK Anti-Algae Pond Balls. Each 1000 ml tub treats up to 1,350 litres of pond water using a biodegradable gel infused with natural barley straw extract. Designed to deliver a slow-release treatment, these gel balls combat green water and blanketweed, breaking down algae-causing substances naturally. Safe for fish, plants, wildlife, and pets, this chemical-free solution is easy to use.Just add 100 ml per 450 litres of water monthly for optimal results. Trusted by pond keepers across the UK, Swell offers effective algae control without upsetting your ecosystem.