Clorox aka Harpic Update

[IanY]

Ya.. what's the concentration of that Harpic in relation to water ?

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

It looks as though you used 50% toilet bowl cleaner and 50% water About the same as soaking a radiator in vinegar and salt for days