Aquascape 95027 IonGen System G2 Electronic Algae Controller for Pond, Garden, and Waterfall Features Drastically reduces pond maintenance caused by algae, Helps reduce unsightly string algae Can be installed directly into the water feature plumbing or the Flow. Chamber can be placed in an area with good water circulation For all containerized pond sizes up-to 25,000 gallons Complete with electronic control panel, outdoor-rated transformer, flow chamber, probe, fittings Probe typically lasts 1-3 seasons, depending on the ionization level it is operated at, size of pond and water parameters of the water feature.