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Determining the flow rate for HOB overflow boxes

G

gogol

I am contemplating on getting a lifereef HOB overflow, since their street-cred seems to be the best. http://www.lifereef.com/siphon.html . I contacted them and was told to determine how much flow I should need in my setup. The guy himself remained somewhat non-committal on the matter, perhaps because of liability issues.

I have a 40G aquarium with 2 hydor 2 (600 gph each) and an HOB skimmer with a pump @ 250GPH (Total 1450 Gph ). Would soon get a 29G baffled sump (taking Paul's (rf-bf) advice and buying equipment for the next big setup ;D). The height difference between the water level of my DT and sump would be 4 to 4.5 feet. Do I determine the flow rate as 30-40 times turnover/ hour?

If that is so, then I am thinking of getting a koralia out the DT and into the sump and placing a 600GPH overflow in a similar location. Let me know if that would work.

Also, any advice regarding a suitable return pump would be appreciated.
 
G

gogol

Bump....

I have decided to go with a 600 Gph overflow, so am now looking at looking for a pump that maintains 600 Gph flow at a height of 4 and half feet above the pump. All connections would be vinyl tubing to avoid loss of flow at the bends.

Any suggestions would be really helpful. In particular I am trying to reduce heat addition to my chiller less tank.
 
J

Jcurry@wesketch

To reduce heat you'll want an external pump not a submersible one. You can go to marine depot and look at the pump curve chart to determine the GPH at a certain head. Panworld and Iwaki make the best external pumps for the money, IMO.

It looks like a PanWorld 100PX-MD40R External Water Pump @ 790gph should work.
 
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