We have a Mag 18 and it's quite loud.
What brand of pump would you say is much quieter, but as effective?

Doug.

I am only lifting the water about 3 feet at the most, so, I am not losing much of the 2100 gph. The tank has 2 overflow boxes with 2 u tubes each. I have a ball valve (3/4 open) on the return from the pump to reduce the flow rate so the overflows can keep up.

WTF u dug up a 9 year old thread to tell us whats probably in their instruction leaflet?!?!?!

I am using a max-Flo 2000 for my return in the 65 it works great not to loud and they come with a 3 year warranty and like all mag drives all parts are replaceable there my favorite pond pumps so i figured why not use one of them good quality they have proven themselves to me. and the price is fair to!