I second that
I have a big RIO for mixing saltwater and its always been a growling dumpster powerhead.
I normally use penguins for PH
's which I like, but I just got three MaxiJet 1200's from captivereefs (one of them came with my new Remora skimmer) and they are lean, mean, and quiet, and the best PH
I have purchased thus far.
And for the money (around $20) they are worth every penny..