On Wed, 23 Jan 2008 09:42:29 CST, chun
wrote:

It's not too big, 1.5m by 1m and an average depth of ~40cm (50cm at
deepest with 25cm marginal shelf).
In it, there a 4 marginals, 3 oxygenators and one waterlily. There's
also 4 comet goldfish (around 8cm) and a small fountain pump that's
just pumping water upwards.

Sounds like 3'x5' and a bit over a foot deep and sounds workable to
me. There are always lots of ideas as to how something should be
done, especially concerning ponds. Smaller ponds can be considered
more difficult to maintain, so you may have to monitor it regularly to
keep things working smoothly. Most of us have gone to UV clarifiers
and filters so we can have clear water and see the fish better, If you
can see your fish and are happy, you are fortunate and don't need to
make changes.
--
Hal Middle Georgia, Zone 8
http://tinyurl.com/2fxzcb