Hi Guys!
I'm new and im reading through the watercooling topics for the first time, when i read this topic. I have a solution for the battery effect. Like has been said before, the two metals will release ions in the water and subsequently the battery effect will occur.
Now if you add a thirth metal (for instance: lead or common iron) the battery effect will occur on the least noble metal, in this case lead or iron!!
You can add a small piece of an other metal in your reservoir! Adding other substances to the water, like anti-fries (sorry dont know if this is the correct english word for it, but people use a substance used for cars to add to the water to neutralise the battery effect), this will lower the waters heat transfere/uptake capacity.
What you can add to the water is anti-foam (in the university in which im working we use this to prevent foaming caused by dying bacteria...) it will lower the surface tension of the water. This will have two main benefits:1-it will increase (optimise) the transfere of heat, and 2-It will have a great effect on the air-bubbles in your WC-system, the bubbles will not stick to the walls of the tubes and they will be smaller and will be carried out more quickly by the water to the reservoir!!!! i cannot remember the name of the substance we use, but i think it is silicone-gel....i'll post the name if i know the name
Ok so far my contibution to this topic, i hope i added some 'new info' and if i didnt.....ahhh well i tried anyway!
Sapientiea