Aquascape® 95027 IonGen™ System G2 EPA Registered. Say goodbye to string algae with the Aquascape IonGen™ System G2! Ideal for use in ponds, Pondless® Waterfalls, and other decorative water features, the IonGen™ System G2 effectively kills algae without the use of traditional liquid chemicals. The system helps to control algae growth throughout the entire system (up to 25,000 gallons) by using a microprocessor that sends a signal to its ion-producing probe. The Aquascape IonGen™ System G2 is compatible with water containing fish and plants and typically costs less than $1 per month in electric costs. Its simple-to-install, energy-efficient design makes the IonGen™ System G2 a perfect choice for the discriminating pond owner or professional.