The Aqua One Grounding Probe is designed to safely eliminate stray voltage and current from aquarium water. Electrical devices such as pumps, heaters and lights emit electromagnetic radiation which can build up in aquarium water resulting in discharges of stray voltage. The grounding probe will dissipate this energy, thus eliminating these discharges. The Aqua One Grounding Probe will also ground any leaking current resulting from damaged submersed electrical devices. When connected to a power outlet with a safety switch (GFCI or RCD), the grounding probe will trip the circuit if stray current enters the aquarium, eliminating the potentially harmful electrical hazard. Suitable for: Coldwater, Tropical & Marine Accessories • Designed to safely eliminate stray voltage and current from aquarium water and ground any leaking current resulting from damaged submersed electrical devices. • When connected to a power outlet with a safety switch (GFCI or RCD), the grounding probe will trip the circuit if stray current enters the aquarium, eliminating the potentially harmful electrical hazard. • Prevents electric shocks. • 4 metre cable length for added convenience.