Hi Ingrid,
If I cover the pond, say with a sheet of plywood, leave a small opening on
the end,
as long as there's good aeration is that OK?

Assume I'm in zone 4b, that is -20 to -25 minimum average, the pond is
10ftx4ftx4ft or approx. 1200gal.
What kind of aeration is optimal. how many cc's for air pump, and how many
airstones or other
system?

Some people suggest shutting down their water pump/filtration, others say
leave it on
as long as it dosen't freeze or water dosen't get diverted. Which is right?
Many thanks for info...
....Kodiak

wrote in message
...
It isnt JUST keeping the water liquid and aeration to put in oxygen, and a
hole to
let toxic gases out... it is how long those fish are going to go without
food because
the water is less than 55oF. that is why some way of covering the pond so
it stays
warm later in fall and warms up earlier in spring is important. not to
mention more
energy efficient than running 1500 watt heaters. Ingrid


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