Best aquarium equipment I've purchased in years
Fantastic piece of equipment for the price.  Completely silent, easily adjustable when in place in your sump, super efficient, easy to clean.  More than enough power.  My sump water depth is maintained at just 8&#34;, and I have room to spare on the power adjustment.  I'd guess it will continue to work well down to a depth of 6&#34; or so, no problem.  I can't believe I suffered with my old hang on the back skimmer for so long.  Getting lots more dark skimmate with zero noise, and no maintenance so far outside of emptying the cup.
Rating: 5 stars