... within a tank. The switch may actuate a pump, an indicator, an alarm, or other device. ... saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, pumps, ponds ... , pressure washers, carpet cleaning mach., reef aquarium, fluid control, ice machines, coffee pots, marine, automotive, automobiles, ... Float Switch Horizontal Level for Bilge Pump