Bootfit wrote:
Hello all - first post here.

Welcome!

We moved into our first home in September last year and have
inherrited a pond in the back garden that is about 2m x 3m. It has a
dead looking lilly pad, a load of pond-type water plants, a few frogs
and a fair few fish.

For the past 5 months the water has been clear but the last month it
has gone really murky with brown/fury sludge appearing on the rocks.
There is also some foam/bubbles appearing where the water from the
pump flows back into the pond. There is also a shed load of frog
spawn.

I cleaned the pond filter in january and I also removed loads of the
pond-type water plants - will this be the reason for the watern being
cloudy now?

Could be. You need to test the water for ammonia, KH, pH, & nitrites.
What is the water temp?

If ammonia is zero, do a 10% water change (take 10% out, add 10% back in
with proper dechlorinator or ammonia binder plus dechlor if water source is
treated). Do the 10% water change every day or every other day till the
water clears. Then do it once/week.
http://www.vcnet.com/koi_net/H2Oquality.html ~ jan
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Zone 7a, SE Washington State
Ponds: www.jjspond.us