At least they are buffering it with Borax, which we know, in general, is a two part good thing-1) it doesn't depress pH QUITE as much as straight Tri-chlor 2) we know at some level borates inhibit algae.

We also KNOW that "double-acting" Tri-Chlor with copper is bad for pools, and so do the companies that make and sell it.

Yet, like the tobacco companies they try to convince us to buy that junk. I'd be more inclined to buy "Double Acting Tri-Chlor, 'Now with Borax!'" than with copper.