This is an electrical product. Read all instructions and precautions carefully before operation. 1.In order to provide continuous shock protection, have a qualified electrician properly install the ground fault circuit breaker (GFC/) receptacle 2.Suitable for outdoor use, and immediately install rain and snow protection near the location where the equipment is used. 3.When using the deicer, the heating element must always be submerged in water. When used as a floating deicer, ensure that the rope is placed correctly to ensure that the deicer floats on a level surface 4. Never let the pond run dry. 5. If the cord is not long enough, you can add a good quality power strip to extend. 6. When inserting the heating element, do not expose it to air. The heating element must be underwater at all times. Maintenance You can thread the power cord through the top of the housing so that you can unscrew the heater from the bottom of the housing. Once the heater is removed from the housing, run the heater under warm water and clean it with cloth and soapy water, if this method is difficult to remove the scale, use lime removal! Simply soak the steel heating element in a shallow dish filled with a half-inch deep lime removal solution. After soaking and cleaning, rinse and reassemble the deicer into the housing. Power Choice 3 different wattage pond deicer for almost any size outdoor ponds. Power consumption and area are related to the specific environment, 500W is suitable for 10 gallons of water. 1000W is suitable for 20 gallons of water. 1500W is suitable for 30 gallons of water. Floating mode Place the heater in the desired location of the pond and plug it into an outlet. It is important to ensure that the outlet is usable outdoors, protected from rain and snow, the pond deicer automatically turns on and off once the surrounding water temperature drops, is thermostically controlled, and maintains an ice-free area. Diving mode Simply unscrew the floating ring from the top of the deicer to convert to a submersible deicer. If the surface of the pond is frozen 1. Drill a hole in the ice with an ice drill. (Be careful not to cut the ice, as the shock wave can injure or kill your fish.) 2. Then put your heater through this hole and run your wire to a properly grounded outlet, protecting the wire from damage.