Just researching for future system.Do they still make those? I ran an H&S recirculating skimmer outside of my sump. Loud as hell, but all there was back then was AC pumps. Once dialed in you can pretty much forget about it.
I eventually switched it out to an ATI bubble master because of the heat generated by the pumps. They're great for really large systems. MRC and lifereef made really popular ones. For those with endless budget, it was Deltec..
Thinking of changing yours out?