refugium upgrad

[leaffish75]

Im wanting to get rid of my HOB refugium and go with a sump below my 20L. Has any one ever built a small HOB over flow? about what size pump would i need to return the water? Im looking at 4 ft of head pressure max.

 

[incysor]

I'd ask Nick to build it for you.

A mag 5 at 4' should give you approx 310gph, which should be fine for a 20g.

B

 

[leaffish75]

i thought about that but then i thought just a simple u shape pipe (off my canister) should be good enough.

 

[incysor]

Huh? I think I may be confused as to what you mean.
You can't run a canister as part of your overflow.
You can run it out of your sump, or out of your tank independant of your overflow/sump/return, but you can't put it inline.

B

 

[leaffish75]

you know how the canister uses that u shaped thing. it pulls water out of the tank. i figured i could use that u shape deal instead of a overflow box.

 

[incysor]

That only works because there's a motor in the canister sucking the water through it. It's not a proper siphon, and won't work instead of an oveflow box.

B