"Mark Ellwood" wrote:

Hello Mark

ME Would a lot of pears adversely affect the chemistry of the
ME pond?

Definately, as with any rotting matter, animal or vegetable. A little
is ok, but a lot will seriously mess the balance up.

That's why you ain't "supposed" to put ponds under trees, especially
not fruit trees, but it's probably too late to move yours now.

Change some water several times over the course of a few weeks.
(Syphon/pump 1/4 - 1/3 out, then refill from water butts or a tap if
they're not available), maybe check the chemicals level, but you can
probably tell when it's getting better since you've noticed it getting
worse.

--
Simon Avery, Dartmoor, UK Ý http://www.digdilem.org/