i dont know the exact amount of water but it isnt that much at all.
i forget what the exact amount of water wetter you should add per gallon but there are instructions that should have come with the bottle you got.... thats widely tested to be the best ammount. its been proven that too much can hurt your temps so be careful.
dont use dye, but
www.caseetc.com has some
with ambient temps of about 22C my load temps are at 30C (1.0@1.2, 1.80v, spir@l, heatercore)