question about Overflow and Fluval 404???

[Gordinho80]

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???

[czcz]

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

[jsoong]

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.>

[toddnbecka]

If ypu put the sump tank at the same level as the main tank, you won't lose flow rate.