overflow box question?

[kware]

I want to set up a sump for my 90 gal tank. What size overflow box should I get. I'm thinking that a 1200 gph box will do the trick or will it be overkill? I'm thinking of getting a CFL Aquatics box off of ebay. Also any pump suggestions would be great.

 

[sjm817]

Using the 3 - 5x rule of thumb, you need ~ 270 - 450 GPH flow from your return. A 600 GPH overflow box would work fine. I'm not familiar with that overflow. Got a link? Be careful. Some HOB overflows work well, and some do not.

 

[kware]

I don't know if the link below will work but the seller on ebay is salt-solutions. I like this one because it says in the discription that is won't lose siphon in a powerouttage and it will start back up by itself, like a lifereef box
http://cgi.ebay.com/AQUARIUM-OVERFL...ryZ46310QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[sjm817]

Looks OK from what I can see. If you get the one with the dual U Tubes, you need to have at least 400 GPH+ or so to keep both U Tubes running without air accumulation.

 

[kware]

Thanks sjm817
I figure if I get the bigger unit it will allow me to upgrade in the future.

 

[gsbobcat]

I have a lifereef and love it. I did about 3 "power outage" tests and it never overflowed and it always restarted on its own. I saw earlier today on the used equip page there is someone selling a 600 gph for $80 shipped.