I have TONS of coepods and amphipods in the tank now. Also saw what looked like a centipede crawling around on the rocks like it was hunting (definitely not a bristle worm), probably about 3/4" long. It went behind the rocks, and I haven't seen it yet again. I'll be on the lookout to try to snap a pic of it.
Cutting the lights back really took care of the diatom, most of it is completely gone, and it's on the retreat. However, I have what I believe to be bryopsis popping up all over the place now. Here's a pic:
It's whispy, feathery stuff that sways in the current. I'm getting quite a bit of it all throughout the tank. Should I be concerned about this at this early stage? Should I be considering the elevated Magnesium attack this early? Arg, hate to get things started on a bad foot here...