Max pond size 20,000ltr 4,400gallon Max flow rate 10,000ltr How the evoUV works The Evolution Aqua evoUV deliver a more efficient and more economical performance than before. The range includes completely redesigned 30 Watt and 55 Watt models, a new 15 Watt and 25 Watt model perfect for use on the smaller garden pond, along with a 75 Watt version and a 110 Watt model. Our range of evoUV pond clarifiers have been manufactured to deliver optimum performance at all times. evoUVs have been designed to clear green water which is caused by single celled green algae and prevent it from returning. evoUVs will work alongside many different filtration systems but when used alongside Evolution Aqua’s pond filtration systems, the evoUV will deliver crystal clear and healthy pond water.