I like the look of that IM one as well. Appears they fit well into the Fluval 13.5 chamber. Unfortunately they are out of stock everywhere. I just found a green machine at petco (surprisingly). Going to set it up tonight.
I tried scooping the affected substrate up a few ago, not sure I removed anything, feels like I more or less just pushed crap up into the water column. I'll see if they reappear in the same spots later.
I also have that $20 microscope coming tomorrow that someone previously suggested, I'll see if I can get a slide ID tomorrow.
This sucks, I know it's just a part of reefing but I was originally thought these were just diatom blooms as they were really faint and no bubbles, today was the first day I noticed it this bad. I also just received my first rock anem today and sadly had to place him in my Dino tank, home sweet home lol