First time poster - excited to use BBB method but have a question!

[CarlD]

I wasn't trying to say alum wasn't cheaper -- I'm almost certain it is, and that you are correct about their motives for adding it. I was just explaining what it does, and why it's a comparatively benign additive.

I was just exploring the rationale for combining Borax and the alum with Tri-chlor. I also don't know much about it chemically.