On Fri, 05 Sep 2003 09:09:54 -0500, Doug Swetland
wrote:

O3raledale wrote:

Hello all,
How does one find out what the frost line is in their area of the country? I
live in Philadelphia, PA. and my pond is only about 18" deep. Will my goldies
be safe in there over the winter with just a couple of air stones going? Can I
leave my filter waterfalls/ stream going until it freezes to the point of
spilling out and then turn off the pump and start the air bubbler then? Please
let me know your thoughts on this matter.

Your county extension service can tell what has happened in the recent
past but no one can predict the future. The depth of frost depends
upon average temperatures and the amount of snow cover.

Here in Southern New Hampshire last winter was very cold but there was
a substantial snowfall in December that stuck around. That snow
insulated the soil so that the frost did not get very deep. Good
thing too, because my peach trees would probably have croaked if not
for the insulating snow.

There are other variables specific to each site: amount of sun,
slope, soil content, etc.


The bottom line is no one can tell you what you will experience at
your site in coming winters.

JMHO

John