The tower itself is trivial to make, of course. So, to justify the outrageous price, they have to claim the media is better. Rather than provide any concrete studies showing improvement in water parameters over alternatives like lava rock, they throw out the Far Infrared marketing campaign.
Note that I'm SEVERELY tempering my language here, because I don't want this to erupt into world war 3 again. If you want my REAL opinion on FIR, feel free to PM me