If you have an IonGen water clarifier Its easy to forget but every 1-2 seasons you need to replace the copper probe to ensure your season is algae free. If you live in the Worcester County, MA | Middlesex County, MA area and are in need of a Spring Pond Cleaning / replacement IonGen Probes / or any other products to start up your water feature give us a call (774) 437-1160 or to learn more visit us at: www.iloveponds.com/water-features/pond-algae-control.html