Bought the CP-40W wavemaker from another reefer for $50 on carousell. Was told that there might be intermittent error. No problem when i used it though but find the wave too strong for my tank. Can feel slight vibration when it is running too. Giving it up for $30. Giving up my UV light for $5. Used for about 1 year. Selling because i have other plan for my sump and seriously, im not sure whether is it doing anything for my tank haha...just my frank opinion. Is 9w btw. Pm me if interested. Sent from Singapore Reef Club mobile app