Non staining coloured coolant??

[BS Dave]

i’m redoing my loop and wanted to use a coloured fluid, either just coloured or a pastel coolant. I was going to use mayhems but want something that isn’t going to stain my blocks and the reservoir.

What colours would people suggest?

Also what are your experiences with pastel? Does it gunk up?

I’d ideally like to not have to touch my loop for a couple of years if possible - until I next upgrade.

Thanks

Dave

 

[BS Dave]

No one? Is everyone just using de ionised water and clear x1 concentrate??