Flow through a fuge

[jumpfrog]

Seems I'm stuck on fuge questions today.
What would y'all recommend for a flow rate through a fuge. My set up is gravity fed by a maxi 900 with about a foot of head. Flow returns to DT through a bulkhead. Using a 28 gallon rubbermaid for the fuge itself.
Thanks for your thoughts.

 

[jjlittle]

I do the same then I have a maxi 900 in side as well

 

[jumpfrog]

I'm curious as to why you have a ph in the fuge as well.'
Did you have cyno issues that the extra ph helped with?

 

[jjlittle]

It appears to do better with higher flow in side but same turn over rate