500 GPH Return + 3000 GPH Closed Loop = 3500 GPH = 46.6 Turn Over

Mixed reef with mostly SPS

45 gallon softie.
1 Koralia 2 600gph
1 Quiet one 3000 600gph
2 mag 350 200gph est with pipe losses. probibally less flow

1400gph 31x/hr Hmm and I still have detrritus settling....

135 gal mixed reef (minimal SPS).
OM 4 Way closed loop w/3600 gph, 1200 gph return (both minus head loss) for approximately 4000 gph - 30x plus Tunze wavebox.

110g mixed reef 2 tunze 6055s on multi-controller, vortech MP40 1 koralia 4, 1 koralia 2 and a conservative 600gph on the return. 9000ish gph, 82x turnover.

90 gallon future mixed tank
Koralia 4, 2x koralia 3, Quietone 4000HH Return with approx 5ft of headloss.

So figure 3750 gph = 41x/hour

I bet your loosing more than just 100GPH head loss on your return man. I loose close to 500gph on my 75G with the OR6500. :wink:

my old tank was 94 gal, and between a couple tunze, couple Mak4's, couple mags, i was pushing 13536gph, for a turn ove of about 144x.

My new tank will shoot for about 125X in a 27 gal tank.

Steve

230 Mixed Reef

Running only a Sequence Hammerhead 5800gph, minus 6 to 8 feet of head.

120gal with mag 12 running spray bar: 1200gph and Sequence Dart return providing around 1500gph after head loss through an Oceans Motions. So 22.5x per hour.

110 gallon mixed reef
1x koralia nano @ 240 gph
2x koralia 3 @ 850 = 1700 gph
1x koralia 4 @ 1200 gph
1x koralia magnum 8 @ 3250 gph
mag 9.5 return @ 950 gph - 4' head =800 gph
total = 7190
roughly 65x turnover i think