I have both (actually a couple of each, various sizes
) and have run them in side by side same tank comparisons...
For instance:..Mag 12 and Quiet One 4000HH..
On an under tank setup -5' head the Mag 12 outperforms the Q.O. 4000H (which is understandable with 1200gph vs 890 gph)
On a "higher head" setup (11') the Mag falls on it's face and the Q.O . starts to shine...540 gph vs. 300...
ALL pumps build up caco3 deposits and need "maintainence"...
And in running them on both FO setups and Reef setups (differing Ca and Alk levels) Both pumps needed more cleaning in the Reef than FO
But I did have more "no starts" (after power out) with the Quiet One than I did with the Mag... indicating the pumps needed cleaning...
I wouldn't hesitate to recomend either pump (there are a few I would not) and the Quiet One can save you some cash..
If anyone knows of a CaCo3 "immune" pump...I'd sure like to hear about it...:yes: