Water cooling with a chiller - water was close to freezing temperature. Most popular way is to use arctic fish aquarium chiller Edit: someone snapped a photo

Water cooling with a chiller - water was close to freezing temperature. Most popular way is to use arctic fish aquarium chiller Edit: someone snapped a photo of it: https://i.imgur.com/dRINhkW.jpg https://i.imgur.com/dRINhkW.jpg and people identified it as http://www.hailea.com/e-hailea/product1/HC-1000A.htm http://www.hailea.com/e-hailea/product1/HC-1000A.htm