No idea how to anti-freeze for laser system chiller?

No idea how to anti-freeze for laser system chiller?
Three tips to guard your chiller through winter.
Working 24 hours
Run the chiller for 24 hours per day and make sure the water under recirculation status.
Empty the water
Empty the water inside the laser, laser head and chiller after done with using.
Add antifreeze
Add antifreeze into the water tank of chiller. Teyu recommends the antifreeze which is exclusive used for automobile.
Note: all kinds of antifreeze contain certain corrosive property, not to be used for long period. Please use clean pipes with deionized water or distilled water after winter, and refill deionized water or distilled water as the cooling water.
Warm Note: because antifreeze contains certain corrosive property, please dilute it strictly according to usage note before adding into cooling water.
Antifreeze Tips
Antifreeze usually uses alcohols and water as base with high boiling point, freezing point, specific heat and conductivity for anti-corrosion, anti-incrustant and rust protection.
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