The only issue I had was that my sump partition for skimmer runs at 8" depth. It skimmed at this depth, but made noise due to the outlet being above water level, so it made a splashing noise. I was able to alter and raise the partition level to 9.5, which is best recommended depth, now the outlet is submerged. It runs whisper quiet. Skimming performance seems really good, uses sicce pump, build is ok, will not be able to get rough with it, lol. Super easy to tune. I have used a nano aquamaxx, similar features, super quiet, skimms well. Breaks all the way down for cleaning. Very impressed thus farFantastic!
How's the noise level?
I have a Bubble King Mini collecting dust, but I'm looking for a smaller/small-ish skimmer for a Red Sea Reefer 170 potentially. I'm considering Tunze's DC offering, but I'm curious about the AquaMaxx now that you mention it.