Pszemol,

Cool experiment. I have a flow chart for the Little giant 3MDQ-SC
and the GPH at 12' is 425 GPH with PSI 7.8. I don't know what size tubing
they used, but I would imagine if the fitting is for 3/4" they would test it
with 3/4". The 451 GPH you got sounds about right for 10'. They also make a
3MDQX-SC which is a circulating pump. You would get more GPH 450 @ 12', but
less PSI 6.1. The electrical consumption is .8 amps (80wts) for the 3MDQ-SC
and .9 (100wts) 3MDQX-SC.
I don't have a chart for Quiet One because I don't use them much. I
wouldn't be surprised that the power consumption for the Quiet One is less.
With a 30 gal. aquarium either pump will give you more than enough
circulation to turn the tank over 10 times. You will need a large return
hole to accommodate the water. 1" bulkhead fitting will only remove 400 GPH.
More than that and it will make an annoying sucking sound. You are only
limited by the drain.

Good Luck,
Aquacare


--
Aquatic-Care aquarium services
Freshwater/Sal****er
Since 1993
www.aquatic-care.com


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