I just meant if the corals are using nitrate rather than ammonia then wouldn't that help reduce nitrates, probably a simple view on itNot sure what you mean by “that”. There are many different processes relating to nitrate with vs without more biomedia, and I’d be hard pressed to predict any particular outcome with respect to nitrate levels.
Long ago when people were removing bioballs from trickle filters, nitrates often declined, and there are at least 2 reasons to explain that result, but that’s a different type of media than those that claim to also promote denitrification.