Ferric Oxide vs. Aluminum Oxide

[msjboy]

also check out these devices/methods to control phosphates/nitrates :

www.aquaripure.com ( a cannister based vodka dosing system for those with underpowered skimmers or don't want the hassle of vodka dosing)
Algae scrubber
ttp://www.reefsanctuary.com/forums/general-reef-aquarium-discussion/35294-mega-powerful-nitrate-phosphate-remover-replaces-skimmer-refugium-everything.html

If you want fastest cure, probably GFO I think.

msjboy