"Jackytar" wrote:

I'm exploring the idea of adding an aerator, as was recommended
by some contributors here, but I get conflicting information. First of all,
the pond is 3 yrs old and the previous owner did not have a mechanical
aerator. There are two waterfalls that make some noise, and today
I'm adding a water spitter (which the previous owner did have).
The pond seemed to be doing just fine with proper maintenance and
no mechanical aerator, at least until this dunderhead took over.

The waterfalls act as an aerator, and with a spitter, you shouldn't
need more than that. Ensure there is enough turnover in the pond,
through the water fall.