I always suggest the non conductive clear premix. Until now the best I've tried is the EK CryoFuel.What is the best water to use for cooling? Which do you recommend?
Between the one I've tried has kept is "clear" color longer than the Alphacool one for example.
For the temps, every brand with a good premix coolant is ok. Some manufacturers like Alphacool though suggest to not use the Mayhems product.