Pond heaters – Most of the time, no outdoor fish do not have special requirements on water temperature. However, in areas where the temperature drops below freezing regularly and for longer periods, the aquarium heater to prevent ice formation. While most pond fish can withstand water where the surface is frozen, they risk death if the pond freezes completely.
Place the heater. Basic aquarium pond heaters will not connect directly to the pond walls. You will need to build a wooden or metal device to keep the heater in the correct upright position. Use small steering rods and finishing nails. Keep the absolute top of the heater out of the water, if you buy a fully submersible heater. If the latter is the case, you can simply place the heater directly at the bottom of the pond. If you choose to use a submersible heater, you should use it with a surface deicer so that toxic gases may leak.
Set the temperature pond heaters aquarium to low, preferably a few degrees above freezing, and connect it to a power source. The goal is to keep the pond from freezing over, not to keep the pond at a specific, uniform temperature throughout the winter.
12 Aquarium Pond Heaters: Quick Installation Photos