In article ,
wrote:

the ice must be thick to support it across the pond and yes, the pond must be
pretty
deep. this is used in zone 4 and colder, like in Sweden IIRC. Ingrid

On Mon, 26 Nov 2007 10:14:36 CST, Derek Broughton
wrote:
Nobody has mentioned a technique usually used for somewhat deeper ponds.
_After_ ice forms, pump a little water out to leave a gap between the ice
and water. This works as well as covering with plastic, but I suspect it's
a bit too tricky to try it with only 15" to work with in the first place.

I learned all I need to know about ice watching the last season of "Ice
Road Truckers"

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wrote:

the ice must be thick to support it across the pond and yes, the pond must
be pretty
deep. this is used in zone 4 and colder, like in Sweden IIRC. Ingrid


I lived in zones 5 & 6 - the ice gets plenty thick enough. Especially if
you don't have snow (and if you _have_ snow, you don't usually have a
problem with a 15" pond freezing solid.
--
derek

I cant remember, is your pond covered?
what was the temp before and after adding the heater? does this heater turn off at
34o or so? Ingrid

Only covered with screen door stuff, so doesn't retain much heat. The
heater is suppose to turn off at a point.... but the point seems to be
45ishF. ~ jan
------------
Zone 7a, SE Washington State
Ponds: www.jjspond.us