I'm limited to the diameter of what comes out of the pump, right? The 2
pumps I tried are both 1/2 inch. I've been looking a the OASE Atlantis and
Aquamax lines, which can vary from 1.5" to 2" outlets depending on the pump
size. Those start at 700 gph but from there goes up to 1000, 1200, 1500,
and 2000gph. What size would give me good water movement without too much
circulation: I don't want to have so much suction that my goldfish get stuck
to the pump!

F


On 9/6/06 11:38 PM, in article
atcfzvasbuvgflfgrzfygqhx.j580bi0.pminews@ouse, "Rodney Pont"
wrote:

On Wed, 06 Sep 2006 22:46:09 -0700, Fredric E. Rose, Ph.D. wrote:

What size would you recommend? Here is my setup: The pond is irregularly
oval, roughly 8' long and 4' wide (at it's widest) and about 3' deep. I
calculate it to be somewhere between 500 and 600 gallons. I've got a small
(~2 foot) waterfall at one of the "long" ends. I placed my pump at the end
opposite the waterfall to get better circulation, so the tubing ran about 6'
horizontally underwater and then up about 3 feet above the pond to the back
of the veggie filter, which spills back into the pond via the waterfall.

I tried out a 700gph PondMaster pump with this setup but got nothing more
than a trickle from the waterfall. Do I really need to go up to a 1500 or
2000 gph pump just to get a somewhat meaningful waterfall? By meaningful, I
mean about 8" wide, 1/4" deep.

What size is your pipe? A small pipe diameter will really restrict the
flow and solid pipe is better than flexible. We swapped 1.5inch
flexible pipe to 1.5inch solid as a trial and got another 40%
approximately. We now use 2inch solid pipe and have a torrent instead
of the trickle we had with 1inch flexible pipe.