In article , Mark
Bannister wrote:

I've seen a tremendous amount of conflicting advice on pump sizing. An
afternoon of reading all this has left me confused. We are installing a
small (700 gallons, 3 feet deep, US zone 7a) pond and would like a few
fish, mainly plants though. I've got a few questions if anyone has the time.
Too small for a koi or two?

What will your width and length be? In general, small koi will be fine
for a few years in 700gal with good filtration... they will need to
move on at some point so include that in your original planning.

Should water turn-over be 2-3 times an hour as some sites suggest
(that's a lot of water to move)?

For 700 gal, thats a good amount.

May I suggest you tell us what pump you are considering and you should
get peoples specific experiences.

Lastly, get a bigger pump than you think you need, you can always
divert the flow to another return line or throttle back a single line,
within reason, with a ball valve.

jay
Thu May 13, 2004



Why are there not any pond pump head calculators out there? Can I just
not find them? If there really aren't any, and if someone would point
out someplace I can get reliable numbers and equations, I will throw one
together if someone has a place to put it. It will be rainy this
weekend and I need something to do.

Mark B.