Do large herbivorous fish harm coral growth via phosphate import?

[Sk8r]

Seems to me that there's a logical disconnect between large, say, tangs and other herbivores kept in a reef---and the wholesale feeding of nori, spirulina, and live macro---and the attempt to cultivate corals.

Naturally a fuge or phosphate remover/reactor is going to yank the resultant phosphate as that algae-based poo hits the biological fan, but am I thinking correctly, that perhaps there is a logical problem here, between our admiration for these beautiful fish, and our desire to have them in beautiful reefs.

Clearly some tanks do it in combination, beautifully. I'm suspecting that a potent fuge lies behind such tanks.

But are we frustrating the daylights out of newbie and intermediate reefers by this image? Seems to me, that if you have these fish in a reef, either the phosphate constantly injected into the reef as fishfood is going somewhere very mysterious OR there must be potent remediation efforts in place to allow this combination. Am I making sense? My point is, should we make a point of saying so when people are at the planning stage?