Quote:
Originally posted by gmat
If 320gph means 1200lph -> then you're talking about the Seltz L30 II which i've been using for more than 1y and half.
Its flow characteristics are exactly the same as the Eheim 1250.
It's running a bit hotter.
It's making a slight noise, nothing disturbing, but i can hear it. Noisier than Eheims, indeed.
It produces a lot of vibrations, i had to suspend it with rubber bands. I think Eheims and other centrifugal pumps have the same problem though.
The impeller *has* to be glued. I ran through 2 shaft+propeller sets though, as they tend to wear and produce a deep "scratching" noise over time.
The casing is nice and small, connections (inlet / outlet) are standard and compatible with Eheim products. 1/2" inlet and outlet, and a nice tubing attachment system, but not compatible with thick-walled tubing 
Price wise, i had it for 1/3 of the price of a 1250, that was the deciding factor for me. Today i have less financial problems, i'd maybe opt for a 1250, who knows.
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You think there is a way to build more pressure with it? You know the space between the side of the impellor and the impellor housing? What if I made that smaller.
I'v been using the same pump and I'm happy with it. Mine doesn't produce alot of heat but I can feel the warmth from it though it's slight and not hot to the touch. It does make that slight rattle once in awhile for about a second. That's the only noise I hear from it. Not even a hum and it's sitting on the bare steel bottom of my case.