"Derek.Moody" wrote in message
...
In article , Tim Nicholson
wrote:

Hi, I'm not really even a lurker here - just dropped in tracking someone
else's x-posts but while I'm in the area...

I have a largish pond in the new garden, about 11' radius and approx
2' deep, apart from a ledge about 1' deep and wide round the
circumference. By my calculations this gives me an approximate volume
of 4,300 gals or 19,600 ltrs.

Like the rest of the garden, this pond has obviously been neglected
for at least 5 yrs before we got here, and although there are a number
of goldfish (around 35 we think) and a small number of larger fish
(possibly koi - I'm no expert), they're difficult to see because the
water is a particularlt turgid green colour. I suspect there's a fair
amount of debris on the bottom of the pond which won't be helping.
There's enough plant life round the edges to keep the toads and frogs
happy, and a few waterlilies which bloom quiute spectacularly in the
summer.

Yes I have a pond vacuum, and it does a great job of removing the sludge
from the bottom of the pond but it is no good for blanket weed. I only
remove excess sludge as I believe that the animal life in the sludge is
helpful in filtering the water. I have a UV filter which keeps the water
clear without the need for large filter boxes etc. My pond is 6 meters x 4
x 1deep so large enough. hope this answers your question.
Diane