I'm in the middle of cleaning using the electrolysis setup shown on this and BassCliff's site. (pretty cool science-y stuff IMO). The anode seems to be coming out pretty much free of the red rusty stuff, but still gobbed up with lots of black and grey bits. I'm hoping that this is not the tank itself being eaten away by the electrolysis process. Has anyone else experienced this same phenomonon?(sorry, just a little loopy tonite).
That's how it works. That stuff you're getting out is ferrous oxide - 'rust' formed in the absence of air. Leave it for a few minutes outside the tank in the air and it'll go brown - ferric oxide or the rust you're used to seeing. Something to do with additional oxygen atoms and electrons ( Fe2O3 and Fe3O4? - but that was a long time ago......