Thank you, EdimarOliveira!
I think you are referring to the first photo above, where I ask if you can see the grasilaria hayi, right? I was really just pointing out where it is popping up. I haven't positioned any of the macros that are coming back, with the exception of the blue hypnea. I have moved some of that around, mostly because I've been removing stray chaeto, that was tangled up with it. I have put some of it where I think it will be happiest.
All of the red macros are growing where they want-I haven't positioned any of them. Mother Nature is taking care of that, and doing a much better job than I could ever do. It's a strategy I stumbled onto, I can highly recommend!
I started out, buying a bunch of red macros. With the strong current in my tank, I had trouble anchoring them down. Nothing worked, including superglue. Then I added the tang, which basically ate them all. Then I removed the tang, and the magic happened. Tiny red macro sprouts are now growing from the rocks, fake roots and wall. One of the best things about it is, they are only growing where conditions are best suited to them. A big bonus is that they are all firmly anchored, naturally, so I don't have to do anything!