For filtering seems flavor of the day, is the use of LR in display (and sometimes LR in sump) and protein skimmer only. Use of DSB seems to have fallen off with people starting with or converting to BB. Having macro algae in the display, sump or refugium is also becoming more popular as a bio filter.
Personally I'm running a mixed reef with LR (display and sump), skimmer, macro and filter socks over drains and is working for me.
As for MH, I was looking to use 250W DE pendants in a canopy and sent e-mails out to Hamilton and PFO. From Hamilton for their Reefstars they suggested 8" above water, PFO for their mini-pendants was 5" above.
And welcome btw.
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