Stand alone UV clarifier units can be added to existing pond systems to control suspended algae in pond water. UV clarifiers should be used in conjunction with a pond filtration system. Ultra Violet radiation kills suspended algae, allowing for collection by the pond filter. Recommended pond sizes below are based on typical ponds with average sun exposure and fish stock in the Perth region. Heavily stocked ponds in full sun positions may require a larger UV clarifier. Please see our fact sheets to help you choose the right UV clarifier for your pond or if you need extra help ring us for advice.