"Scott M." wrote in message
...
I have a pond that is around 3 1/2 feet deep. Right now, my thermometer
indicates that it is 0.1 degrees Celcius down there at the bottom. The Koi
and Goldfish
are still alive but isn't that a little too cold? It's not even winter
yet.
I have a bubbler to keep the surface clear and a floating 1250 Watt heater
if I need it later, but I was thinking of lowering a low wattage heater to
the bottom of the pond just to make sure the poor fish don't freeze. Is
this
a good idea?

BTW, my pond photos are at

http://pg.photos.yahoo.com/ph/murchi...mK9ICBHtrk1kvG

Scott




Hi Scott,

The general advice is to put in a bubbler to keep the ice open. You might
also need a floating de-icer in colder climes.

However, being paranoid. I built a cover for mine and put a 300 watt heater
on the bottom. The heater hasn't kicked in yet, as the pond is still 42F. My
pond is not quite as deep as yours, so I was concerned that it would become
a solid cube of ice in January. If this works out well, I may try to raise
the temperature above 50 earlier in the spring, so I can start feeding
earlier. Although I suspect 300 watts won't be sufficient.

Where are you located BTW?