If you want color in the loop, tubing is where you do it. Dye's in the water will eventually degrade and the component chemicals will clump together and jam up blocks and such. Also it stains your tubing after a while.
So if your willing to clean out your blocks on a fairly regular basis then it should be fine, but otherwise just have plain distilled and colored tubing.
That is a good example of a dye you dont want running in your loop.
Despite it not saying it anywhere, that dye is not intended for permanent use. That clogs your loop really fast. Only useful for when you want to put your system on display.
As I said before, coloured tubing. You can also set up LED lighting if you want a glow effect. Bitfenix offer an "Aqua" range of LED strips that should work inside the loop.
I think you are missing the point...Mayhem's Aurora is meant as a very temporary-use coolant for shows, etc. and not meant to be run long term as it tends to separate out into various components from what I have read many times around the web.
* get it if you want to add color to your loop, you'll quickly realize that it'll wreck with your ~$300 watercooling setup.
** You can get a nice picture after adding the dye however temps won't be favorable to you which would dictate tearing down your loop (seems like a lot of effort for some pics to show off to the public) and if we're carrying on from this thread, Mike, creator of Mayhems Dye's strongly suggests users to avoid the XSPC bay res if you want to use his dyes. Might want to look at my $500+ setup in my vintage case mod...one reason for going with the Gigabyte orange is so that I can pass off a death sentence to the H50 and I had to rethink my res options if I wanted to try the dyes from Mayhem out.
You have money and time to splash -> go ahead.
You want solid results with you coming back to show off how good your loop is working (without the coolant) -> go ahead.
*** would suggest the latter instead of the former.