I know that some of you are using UV nasty killers. Especially usefull to people using evaporative cooling. The add heat to the water though.
I fond info on Copper/Silver Ionizers that kill nasties by putting ?positive? copper silver ions into the water:
Link
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Floatron
Positive ions do not sound good as far as block corrosion is concerned?? Then I found this, which looks promising:
Link
Some products seem to add ions simply by having the metal present in the water:
Nature 1
Frog
While all thes products will help to kill nasties, I was hoping that they would also help prevent corrosion??? :shrug:
I will look into this further later, but am hoping for soome independant research from more qualified forumers.