Eshopps pf 1000 overflow

[VaderWS6]

I'm changing my overflow box on my 75 gallon reef, and was wondering if the Eshopps PF-1000 would match up to a 650gph return pump? I like the idea of having 2 siphon tubes instead of just one for added security. The PF-800 only has 1 u-tube

[gh0st]

I have one running on the slower side for it's rated flow rate, and I actually seem to consistentlky lose the syphon in one of the two utubes.

If you have enough flow to keep them both running they are nice, but you will probably need more than 650 gph. I'd shoot for at least 800+ gph.