Sump set up for APF600 and FR509 reactors

If you are running your aquarium with live rock I see no real reason to use
the Matrix media as it is best to leave biolological filtration to the live
rock to keep your biological processes well balanced.

I would run the the APF600 before the refugium so it doesn't skim
plankton/organisms post refugium that may find their way back to the
aquarium as these will be beneficial.
The water from the skimmer can be pumped into the refugium or a section just
before it.

I would place the Fluidised reactors post refugium especially if growing
Macro algae's within the refugium as it will give them chance to take up any
PO4 and nutrients before the water is processed by the Rowa phos and carbon.

Instead of running one of the reactors for Rowaphos I would consider running
two and changing the Rowaphos out on an alternate basis. This will maximise
the Rowaphos as it will still remove PO4 at a reduced slower rate as it becomes
exhausted. By running two one will contain fresh Rowaphos for maximum
removal whilst the other containingolder Rowaphos will still be removing a

Hope this helps Tony