Snooze wrote:

Drain the pond to the point where you can safely wade into it, maybe
about 45cm deep. See if you can get a wet-dry shop vac, pump out the
sludge into a few buckets. Just dump it around the garden, think of
it as fertilizer. It might have a smell for a day or two, but after
it dries up, the smell goes away.

The sludge is the accumulation of dead bacteria and algae, fish
waste, dust and leaves that were blown into the water, the carcass of
aquatic insects. It's natural, every so often we all have to clean it
out of our ponds and dispose of it. A lot of times you can just use a
pond skimmer net to scoop out the thicker sludge.

-S

Thanks, I thought it had arrived due to poor balance in the pond or
something. Glad to know that it is a regular thing. I assume that my
turtles adding lots of waste do not help!
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