OK, I've had 5 pages of reading to catch up, and a lot has happened with your tank, all good for the most part. Your last pics are pretty stunning. I agree with Dawn that a video would really be great, but I don't want to pressure you into it. Maybe some day...
I love the new tufted joint algae. It's really cool looking. And moving the turtle grass rock to the wall sounds like a great idea. Last I read, I think, is that it was doing well. Has it continued to grow? Is it spreading on the wall?
One last thought that I had as I read through your exchanges with Steve and ThePurple12 is that perhaps you wouldn't have to dose ammonia and such for plants if you had a large fish bioload. Is that your goal someday?
BTW, I think the Herald's angel would be a great addition. I know that I've said it before, but, I don't think it would decimate your macros. It may eat some, but I'm pretty sure it would just as readily go for added fish food.
Also, I found the mating ritual of your blennies interesting. Have you noticed any fry (fish larvae) at the water's surface?
Have you replaced the blue light bulb? Are the red macros coming back, if not?
One last thing...what do the bases of the mangroves look like? Are the roots sticking out like the larger plants do in the wild yet? I guess that takes a lot of time. But, I'm curious about that.
Again, your tank looks fantastic. Sorry that I've been away so long. I really enjoyed catching up though. Sorry for all of the questions LOL.