the pump is rated at 900gph but after hoses, media etc you lose about half, so realistically depending on media selection and amount your looking at 400-600gph imo. It isn't a bad idea to add an ac110 to the mix for good mechanical filtration and added surface agitation, also gives you more of the turnover your looking for. As said above great filter and if I found one used I would have bought, instead I bought a new fx5 which is in the same ballpark
RBP love current and keeping them active has tons is benefits on health plus it helps keep the poop off the substrate and into the filter, therefore I strongly recommend a powerhead/circulator, for that tank atleast 1500gph. The Hydor Korila is awesome, free s&h too:
http://www.petmountain.com/product/...-hydor-koralia-circulation-and-wave-pump.html
A sponge filter is STRONGLY recommended, not only for Bio and mechanical filtration but if the power goes out all you need is a battery powered air pump and your fish are good.
Make sure the sand isn't to fine or it will find its way into impellers and motors in no time. Pool filter sand is a larger grain sand that I cheap, check out your local pool supply store (lees or Leslie's)
My fx5 manages 6 reds fine, but my pothos plant does most of ammonia/nitrate consumption.
Check it out on the link below, imho best 20$ investment you'll ever make! Have fun building the tank and starting a new family! Pics please!
×Go S Vettel #1 Infiniti Redbull! 3x WDC!!!×
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Cheap way to decrease nitrates and keep your fish healthy:
http://monsterfishkeepers.com/forums/showthread.php?t=504763