Algae & Green Water Pond Treatment

Choosing the right treatment largely comes down to matching the dose to your pond's volume, so it's worth checking the exact litreage before you buy rather than guessing — our pond volume calculator makes this quick if you're not sure. Most treatments are added directly to the water and get to work within days, making them a simple, low-effort way to keep your pond looking its best between filter cleans. For ponds with fish or plants, always check the treatment is safe for stocked ponds, and try to treat early in the season before algae really takes hold, as smaller blooms clear faster and with less strain on your existing filtration.