Clorox aka Harpic Update

[AussieJester]

As per Aussie Jester, I used less than a 2% concentration and there wasn't the faintest hue of blue.

exactly mate :-) Using it in large quantities as Perfection has it will eat through the seals long before you need worry abut it messing with the copper, interested in how you go if you drop it to 1% to Ian :-) Dunno if i mentioned before, I'm using Milton now, its a solution available from most supermarkets here a capful treats 2litres of water it is sold for cleaning baby bottles works a treat at keeping the nasties at bay shall be ripping the waterblock down in a week or so when i change to another case so will see then how its affected the copper, looking through the clear plexi top though looks as clean as the day i made it ;-)

Perfection perhaps try your "experiment" again using the mix suggested and see how it turns out :-)

EDIT: Regarding the tap water i use, we do have very good quality drinking water here in the the Perth hills i certainly wouldnt advocate the use of tap water for everyone, if your hard up put a few plastic containers outside next time it rains and use the water collected ;-)