There's not much in those posts; Spectralight got lawyered up, after I published the information I found, so I removed most of it from public view.

What I can tell you is this: neither I, nor anyone on the PF Support Team, would buy any product from that company, for reasons that have nothing to do with their threats to sue.

I would also point out that you can reduce the FC on your pool to 0.5 ppm for any reason, or for no reason at all. But that's not to say it will be sanitary or work well.

'Nuff said.