question about overflow box

[skylineGTR]

How do I increase the flow of this overflow box? The dimensions are 6x3x9.5H, 1” bulkhead, 1” U-tube. I don’t know what brand or what the current gph flow rate is, but it looks pretty close to Eshopps PF-300 (300gph). I want something close to <800gph. Would adding anther U-tube work without going over 800gph? thanks
http://www.fosterandsmithaquatics.com/product/prod_display.cfm?pcatid=18358

 

[Spiritofthesoul]

Get another one

 

[skylineGTR]

any mods on the flowbox that i can do to increase the rate???

 

[karak]

You are limited by the size of the u-tube and the size of the bulkhead.
Only thing you could do really is add a second u-tube + 2nd bulkhead, or replace the current ones with larger diameter ones

 

[pennex1]

This one works great. plenty of gph and comes with all the fittings.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=380323238528&ssPageName=STRK:MEWAX:IT

 

[rafael707]

This one works great. plenty of gph and comes with all the fittings.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=380323238528&ssPageName=STRK:MEWAX:IT

im acutally debating if i wanna go with this, or if i wanna go with the eshopps pf-1200, im worried that it might break, looks like a cheap china made box imo