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Old 09-21-2006, 05:53 PM   #1
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Too much water flow?

I was just wondering if more flow to a sump is good or if it their can be too much. I am working on a 10 to 15 gallon sump and was wondering to go with the 600 gph or the 1200 gph overflow box (29 gallon main). Which one would be best to go with? TIA..........
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Old 09-21-2006, 06:02 PM   #2
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Well as they say you can never have too much flow, but in this case I think a 600gph is plenty. It really all depends on what size pump you are going to use. If your pump is more than 600gph then you need to go with a larger box. The overflow box does not control the flow rate, the return pump does. The overflow box just needs to be rated as high or higher than the return pump you are using at the height you are using it.

So, if your pump is rated at 700gph and you only have a 600gph overflow your main will overflow. If you have a 700 gph pump and a 1200 overflow box your flow will not exceed 700 gph.

HTH,
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Old 09-21-2006, 06:10 PM   #3
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You can never have too much flow in the display, but in a sump too much throughput can be very noisy.
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Old 09-21-2006, 10:54 PM   #4
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keep in mind also that your pump isn't going to get max flow when it has to push water 3-4 feet up.

I have mine set up with a 1000gph box with an aquaclear 70 pump...400gph

Works really good.
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Old 09-22-2006, 08:38 PM   #5
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Also, it depends on what type of filtration you are employing in the sump. Think about the contact time. If you are running a skimmer, the more contact time, the better. Think about it like stripping ammino acids was like stealing hubcaps... would you do better on the interstate, or in a parking lot?
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