blitz pro

Hi, I have had Mayhem pastel white in my loop for a year and have decided to swap it out for just distilled water. The trouble is after draining, flushing till it runs clear and then using Mayhem blitz part 2 running through the system for 24 hours, my hard tubes and reservoir still have a dull...

I will be assembling my first hardline loop with a pastel fluid, just waiting for the last waterblock. I have ordered a Blitz pro kit to clean to new EK rads out but with it been a new system should i also do the second part with the loop assembled with all the fitting/blocks been new or would...