Hi guys,

I just received my Chinese 80w laser with a cw5000 water chiller.

The normal practice I found is to use distilled water but I can't get this in my country. Even if I find a seller, chances are its fake (just tap water)

Should I use just tap water with a vehicle coolant (pink)?

Or can I just use pure vehicle coolant (the pink one) will this work better?

I'm particularly worried about rust which I read is an issue with these cw5000.
Is there anything to consider with using pure coolant and should it be the pink or blue one?
Thanks guys