So I ended up stopping feeding so much Reef Roids, and my Spirorbid problem basically completely went away few months ago. Oddly though I notice I have a lot more of these red slugs. I don't think I have new Spirorbid worms growing because surfaces I clean like glass, and back glass have zero worms. I have a bunch of what I think are old shells of the worms on rocks, just because those will last until something scrapes them off. I wonder what these slugs are eatting. They're multiplying and seeing quite a bit lately. I wonder if they eat Cyano, Dinos, or Diatoms, which I have low levels of each, but decent amount of Cyano in refugium only, and that's where I see these guys the most.