I could be wrong ( I often am ) but from my experience with pellets the pellets -when working- put out a noticable amount of bacteria stuff that definitely is detectable in the skimmer (as in stinkier and richer) skimmate.
Nothing in the skimmer would make me suspicious that there is nothing much coming out of the pellets.
With your rockin' amount of macro though they probably also take up the nutrients that in other systems would go towards the pellet bacteria.
When my bacteria population on the pellets was very active macro was struggeling and often not making it.

It's a beautiful system and obviously working. I was just mentioning the pellet thing in case you ever get to a point where you want to reconsider your set up or how most effectively to allocate your investment.

I absolutely love your macro tank! Nice job!