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Old 06-19-2011, 10:09 PM   #1
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at a loss, please help

i have a 20g sump for my 75g tank, i wanted a good turnover so i bought a return pump rated for 630gph! i also bought a Aqueon Proflex 110, 932 gph overflow! Now i'm no math major but why can i only open the ball valve on my return line barely halfway before the return starts to empty! Is this just bogus advertising on the overflow box? It has a one inch bulkhead and a 1 1/4" hose straight to the sump! Backing off the pump made it sound like a freight train, so i swapped it with an "el cheapo" i have just for water changes! any ideas or advice would be greatly appreciated.
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Old 06-19-2011, 10:30 PM   #2
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You lose a lot of flow depending on how many u turns it takes, 90 degree turns, inches/feet it has to push the water, etc. Not shoddy advertising, but you are probably losing most of the flow because of the path the water has to take.
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Old 06-19-2011, 11:01 PM   #3
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I have the same issue with my setup. 1532gph return pump, 1200gph overflow and i have the ball valve choked WAY back or the sump runs dry.
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Old 06-19-2011, 11:02 PM   #4
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i realize that. Thats why i opted for hose instead of pvc! I just cant wrap my head around it!

thanks, rob
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Old 06-19-2011, 11:04 PM   #5
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I have a direct connection thru 1 inch hose with NO bends or anything.
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180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.
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Old 06-19-2011, 11:06 PM   #6
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what size sump are you using?
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Old 06-19-2011, 11:23 PM   #7
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i think its 30g
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180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
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Old 06-19-2011, 11:33 PM   #8
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i'm wondering if the design of our sumps is effecting(slowing down) the water too much before it gets to the return???
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Old 06-19-2011, 11:38 PM   #9
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Thats what I've been thinking. I have a refugium in the center compartment and dual 1 inch overflows coming in and still can't keep the water flowing enough for my return pump.
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Old 06-19-2011, 11:42 PM   #10
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someone out there must have encountered this problem and won!!!
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