Gary,
Forgive me if I don't have the latest, but I was following those threads closely. As far as I remember, unless there has been new documentation, the elevated levels of bromine have not been proven to have any negetive effect on salt water aquariums. Also, with regular water changes, I thought the potenial higher concentrations were well mitigated.
I don't remember Randy writing any results or advice in this regard, just observations. Has there been new evidence, or did I misread those threads?
I have been using Prestone Driveway Heat (a DOW product) with Randys recipe number one. I haven't followed those threads in quite a while, but I haven't noticed any ill effects on my corals.
Just throwing this out there. It's almost time for me to whip up a new batch. I think I'm going to order from Two Part Solution. IIRC, they source product without the elevated levels of Bromine.
Respectfully,
Ben