I got a bottle of feser aqua double distilled water. So I need corrosion blocker? As I understand galvanic corrosion, none should occur since I am using only copper/nickel plated copper blocks, am I right? What about erosion? Does corrosion blocker help in this case? Is erosion even significant? I am changing the fluid of my liquid cooling system again. Instead of buying pre-mixed fluid this time I want something without coloring. Because last time I was changing fluid I dripped some on my motherboard and now some plastic parts are forever stained orange. The cleanup wasn't pleasant. I imagine cleaning up distilled water is as easy as letting it dry. Unfortunately I live in Canada and for some odd reason I can't find clear corrosion blocker that doesn't have coloring. I don't want to order international because that is going to be $20 shipping on a $5 bottle.