Great. I just ordered a magnesium anode rod from your site. When I get it, I’ll install it and then check it in 6 months and compare the two rods.
Well, darn. It has been six months, so today I checked the replacement anode rod that I bought off of this site. It looks exactly like the OEM GE one that I removed six months ago. Furthermore, after a closer inspection of the OEM one today, I’ve noticed that it definitely has what looks like a thin, hard layer of calcium carbonate on it that I can scrape off with a flat-head screwdriver.
So, my running tally. My last three anode rods checked (including the aluminum one from my old AO Smith unit) — all seem to have passivated.
:X – Bryan