On Sun, 27 Jul 2003 19:34:15 GMT, Simon Avery wrote:

Price for the higher power pumps seem to rise dramatically though.
I've used twin smaller pumps (200watt general purpose submersibles,
not something badged as "pond" because that seems to put the price up
for no particular reason) to gain an equivalent output for less than a =

single big pump. Gives an advantage in that if one does break and the
pump is producing oxygen, you don't have to panic to get another in
before all the fish die.

A couple of years ago I would have agreed with you Simon but with the
new ranges things have changed. For example the Maximus 9000 can shift
9080lph, has a maximum head of 5.5m and only uses 150watts so can be
run for about =9C75 per year. It can be got for about =9C110 from variou=
s
places on the web. Even last year I couldn't find anything this
efficient and the new this year Otter Olympus range looks good too.

I had a look at screwfix and their pumps are from 200 to 300 watts and
shift 7500lph. Yes they are cheaper to buy but even the 200 watt one
costs an extra =9C25 per year to run and over the life of the pump it ca=
n
more than cover the difference.

I agree with your point about two pumps, we have one for the waterfall
and one for the filter so if one fails there is water flow while it's
replaced.

--
Regards - Rodney Pont
The from address exists but is mostly dumped,
please send any emails to the address below
e-mail ngps07 (at) infohit (dot) fsnet (dot) co (dot) uk