Quote Originally Posted by R3alsp33dy0ne View Post
Any dyes will break down eventually. It's simply a matter of time. I personally use only distilled water and coloured tubing. As far as I'm concerned, if you use any kind of dye/colouring you are asking for trouble.
If you use dye/colouring you need to understand that it requires maintenance. As long as you're willing to refill your loop every 6 months or so and do a complete cleaning once every year then I don't think there will be much trouble.

It's a shame so many people have a hard time actually keeping this up for several years, which is why so many loops get messed up and dyes get such a bad name

Don't get me wrong, there are many things that cause the clogging besides bad maintenance, however I believe most of the problems here can be prevented with regular maintenance.