Swiftech HydrX Extreme Duty Coolant is a great value as one tiny little 60ml bottle mixes with 1 litre of distilled water. Hydrx prohibits oxidation, formation of Algae, and improves heat transfer.  Swiftech HydrX coolant is also UV reactive as well; an added bonus for those that like to show off their water-cooled system. 

Features:

• UV Sensitive
• Green
• 1 bottle : 1 litre Distilled water
• Anti-Freeze agent: Ethylene Glycol
• Prohibits oxidation, formation of algae, improves heat transfer