Turbelle Stream,
I have one, 1,800 gph and I have a 900gph pump direct, the pump puts out a hard flow very directional until it hits the rocks. The stream isn't a pump or ph in that sense. It can be set to fluctuate from Max to anywhere down to 50% power. The one I have only uses 17 watts of power, try and find that in any pump. It will not blow nearly as hard as a pump, or way more than any PH made but It will produce the widest Stream I've yet seen, it uses a Prop instead of an Impeller which makes a big difference, also the coil is separated from the unit housing, so all the heat never touches the tank. It also has a feed timer & you can get the photocell that works with your lights, which means at night it will reduce speed to a softer slow pattern. Down falls, it is an object hanging in your tank, although I don't have the now available fake rock to set it in, another down fall is if you need to remove the prop unit for cleaning, you have to almost unplug all of the connections to get it out, why did they make connections for everything but the unit and the controller who knows, other than that, I want another :LOL