Hailea HC Water Chiller — Titanium Heat ExchangerHailea HC Water Chiller Titanium Heat Exchanger For hydroponic growers who've lost a crop to pythium, the Hailea HC Water Chiller is the single most important piece of kit you're missing. It keeps your reservoir nutrient solution in the 18 20C sweet spot year round, dramatically boosting dissolved oxygen and shutting down the warm water pathogens that destroy root systems. Why growers choose the Hailea HC Chiller: Pure titanium heat exchanger won't