I've personally had zero issues w/ Mayhems Fluids, currently run Mayhems X1 BloodRed (red and yellow are their most sensitive colors and are prone to changing) so far zero color change in the red (been running for 9mo's in a Acrylic tubed loop and Bitspower Nickle blocks). I've also run their Pastel Mint Green and again zero issues and used Primochill's Advanced LRT. Now Mick can be a good guy don't get me wrong, but this kind of response has been seen way too often from him (Should see the recent vlog from JayzTwoCents). Problem is, as I said, Yellow and reds in their fluids are overly sensitive to ph imbalances and heat (certain temps are known to cause these colors to change). Now I know they've released a new Pastel Extreme (Nano fluid) that is supposed to be alot better. Then who knows how long that Litre of coolant sat on a shelf somewhere and more than likely wasn't kept at the proper temps as stated on the bottle. After certain recent events w/ Mayhems' and how they've been poorly handling customer service I wont be buying anymore products of theirs until I see a change.
Side Note on my loops I tend to do a vinegar/distilled flush on the rads for 24hrs, then straight distilled flush for 12hrs, then Baking soda/distilled on all components for another 12-24hrs, and again a 12hr distilled flush. After the final flush I run distilled for a couple hours then pH test to ensure I'm at 6.8-7 (which is what Mayhems recommends for prevention of color change in their fluids). This is alot of work to ensure their fluids work properly, but I also do this process for when I run straight Distilled w/ biocide to ensure now growth etc.
