Good links Nick, i figured there had to be some more info on the acretion process on some reef sites. but i can never seem to get into RC's search engine. always busy.
yes, the articles and patent description in that first forum link mention the other thing i had thought about but didnt mention. electrolsys of free chlorine gas at the anode. I was thinking about it because thats how we make sodium hypochlorite, or bleach. electrolosys of salt water. the ocean is infinite , our tanks small. but still there must be a way.
for those that couldnt make the meeting heres the prime link to the BIOROCK organization for reef building. check all the drop down menu links for photo archives and articles on projects around the world..
http://www.biorock.net/
according to the patent, low voltage DC is the key, just a couple volts, and in closed tanks very low milli amps. so a single solar cell crystal might do the trick. anything more would be dangerous and destructive to the tank live. but the same side effects would still be there.
of course plenum type deep sand beds operate on an ORP differential charge between the low oxygen water space below the sandbed and plenum, and the general tank water above. that creates a natural charge differential. battery,between tank water and sandbed , and anything attached to it. like the rock. perhaps that is why hard corals in my plenum reef tank do very well, a natural setup of acretion charge. Hmmm?? but im not clear right now if the low opr sand bed is the negative charged cathode? if so thats what makes it better.