i think you may be okay to pass on flourite and save a couple dollars. a majority of your plants are water column feeders. the wisteria (can be planted or can be left floating) is going to be a good "nitrate sucker" and the ferns and anubias should be allowed to root on wood or rocks. i wouldn't suggest burying them in the substrate. your other plants that do get rooted will probably be okay with just some tabs underneath the roots. these will also be okay without Co2 and in low light.
your microsword will like fertile substrate and high light though.
make sure to keep your temple leaf dosed with iron. it craves it!
Oh yes, forgot to ask this. If the plants use up the nitrates should i stop the biological filtration or do they not need that much?