Yeah that's why I kind of wrote them off as husbandry issues... the posts basically contained zero real information just "I put RidX in my tank and now a week later everything is dead". Could have been trolling (Or using the scented liquid instead of the solid stuff), who knows- seems like the prevailing theme is that it's quite beneficial.
I was planning on putting into into a fine mesh bag in the sump rather than into the display directly. Is it better to just put it in the display though?
Thanks for linking the videos!