Stray voltage in the aquarium can be attributed to causing various problems. Problems such as: finrot, hole-in-the-head disease and numerous others. The `Ultra Ground` Titanium Grounding Probe can help eliminate these distressing problems. These probes feature a SOLID Titanium rod, insulated transition joint and 10ft of grounding lead to insure proper performance. Don`t take a chance on having stray voltage in your aquarium. 1/8" x 9" Titanium Probe w/ 10 ft wire.