Hi there,
ZEOvit has the potential to handle PO4 and NO3 and also feed the corals at the same time. No need for denitrators etc etc. You just need these 4 (ZEOliths,ZEObac,ZEOfood,Activated Carbon), a reactor to house the ZEOliths and an efficient skimmer. You might need to dose ZEOstart initially to speed up the depletion of nutrients but once you are in the later stages of the system, ZEOstart becomes optional and can be dosed infrequently.
Best place to learn about Zeovit is : www.zeovit.com
Its an international forum with lots of good brains involved.
Cheers!