what do you think(for flow)?

[LostMind]

running on a skimmer, the mak4 is loud. Just running as a return, its a great pump.

the head loss from the mag pumps is pretty significant. I forget where I saw the chart, but someone had put together a chart of a bunch of popular pumps and their flow characteristics. Probably was on RC or RDO.

Do you already have the sea swirl? if not, have you considered the oceansmotions.com product? I have the heavy duty 4 way unit and its put together sooo simply I dont think it can ever break down.