Subsea, your explanation is very impressive to me. I'm sure that for the nutrient export part, trimming is the only way to export it. For the feeding part, it's not the macro algae itself or the dead macro algae, but those fed in the macro algae would do the job to feed the living things in the main display due to effluent water into the tank.
I have Chaeto full of pods in my refgium, and my mandarin is happy not eating any food that I feed. I guess he's probably eating something out of my refgium, maybe tiny pod babies or something out of the refgium.
By the way, ReeferReefer, I suggest you to take an ICP-OES test first so that you see nothing harmful is in your tank before you start Triton method.
I had once been doing Triton method, but tin was detected in my tank, and I couldn't figure out the source of tin. I replaced wave makers, main pump, tank itself, etc. with no luck and my SPS died no matter what I did.
Because Triton suggests no water change, and tin couldn't be removed by Detox, I had no way to remove Tin out of my tank. The problem with Triton is that they offer lots of elements to add, but a certain substance you don't want in your tank cannot be fully treated with any of Triton products. If that's the case, you may want to do an ordinary water changing method rather than Triton.
That said, if you go with softies, then a bit of unwanted substance may not be a problem. Good luck!
Yas