It has been a few years since I filled in the old pond (wrong location
and a small toddler)......the little one can now swim so the time is now
right again. There are three possible locations for a pond, all of
which, I'm sure will end up as ponds in the end. But for now, I need to
fix the water feature so extending it to a small puddle should not be
too much extra work.

The "water feature" consists of a reservoir taking the water up to a
prefab waterfall covered in rocks so looks reasonably natural. The
problem is that the darn thing leaks - so at the very least I will need
to lift it out and line it so all the water goes back into the reservoir
- a water feature doesn't look quite right if you need the hose pipe
running into it to keep it topped up when you run it - lol....the
resident frogs don't seem to care though....

So my thoughts are I may as well extend it to create a small
pond......the plan would be to line the drop into the reservoir but
continue to use the pre-fab (maybe)......remove the grilling and the
reservoir itself and dig out a bit further. The reservoir already goes
below the frost line so I don't need to go deeper.

The pond/puddle itself will not be of any great capacity.....I'm
thinking a few goldfish/shubunkins and a lot of oxygenating
plants......by the time the fish outgrow it the larger pond should be
under construction/finished. The top reservoir would be heavily planted
to act as a veggie filter (and I love watercress so that would probably
be the plant of choice). The circulation would be done by the existing
Hozelock pump (I forget it's exact turnover - it has been there for 5
years). I'm looking at a light fish stock and using plants and the
veggie filter to provide the only filtration.....the pump will aerate
the water.....

Anyone see any flaws in this plan? (apart from disturbing the frogs)

TIA
Gill