John Bachman wrote:


I too am interested in the airstone issue. I see no logical reason
for keeping the airstone off the bottom of my 40" deep pond. If it is
down there then it will aerate all of the water as it bubbles to the
surface. That is good, right?

It seems to me that circulating the water does a lot of good and
little bad. Or am I wrong on that?

John


the water has "layers" that are diff. temps.
the bottom is warmer that the top due to
the ground temps below frost line. an airstone
on bottom disrupts that layering effect.

a properly constructed pond has the bottom
at or below the frost line for that area.

i.e.
im in RI and we have a frost line of 3',
my pond is 4' at deepest part.


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