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Old 04-20-2006, 08:23 PM   #1
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question about Overflow and Fluval 404???

i was wonderring...since the 404 has the 2 hoses, input and output...if i put an overflow box on my tank connected to a smaller tank underneath and have the intake sit in the lower tank and the output in the main tank, will that work???

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Old 04-20-2006, 08:45 PM   #2
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It should, though the Fluval will then have to push the head height from the sump to the main tank, which will lower flow. Until he reads this read, it would be a good idea to look for jsoong's posts since he does this with his Magnum and sump. Here's a good one, including how to estimate flow rates: http://www.aquariumadvice.com/viewto...um+sump#401293

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Old 04-20-2006, 11:56 PM   #3
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OK I am here!

I did use a Magnum as a return pump for my sump. It worked OK but as czcz stated, the flow rate is much reduced due to head height. In my case, the Magnum managed 150-200 gph without any filters (empty media basket). Using the micron filter, flow rate is more like 150, but drops quickly as the filter gets clogged. After about a year of weekly servicing/cleaning of the Magnum, I gave up & now is using a hydor submersible pump (600 gph rated, about 400 actual).

You might have better luck with the fluval. From what I read, it is a better canister than the Magnum & easier to maintain. <I might still be using the Magnum if it didn't take 1/2 hr or more to assemble & prime the thing every time I need to clean it.>
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.
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Old 04-21-2006, 12:49 PM   #4
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If ypu put the sump tank at the same level as the main tank, you won't lose flow rate.
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flow, fluval, overflow, val

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