I used a bunch of blue dye-lite in my system, and for whatever reason the glow has slowly been going away (no, not from any leaks!), I can hardly tell any is in there with a blacklight now... so, I thought I should try some green dye, but I dont want to empty my system to add some new. Anyone mixed 2 colors together? I dont forsee any problems, but I thought it would be best to ask if anyone else had tried...