So my cycle seems to have stalled at high nitrates. Help please? :D

[Spyd]

I would remove the canister from the system and use a reactor to run GFO and/or carbon. The foam in the canister acts as a nitrate factory as it collects food and dietritus. Also, are the hoses going to and from the canister ribbed? If so, gunk and debris settle in these ribs and decay as well.

I agree, that live rock and skimmer should be sufficient for your bioload.