Posted: Jun 26, 2012 3:42 pm
A complete stab in the dark...
Maybe the warm water has more impurities suspended due to convection in it that ice crystal can form on, whereas in cooler water the impurities would tend sink to the bottom?
Maybe the warm water has more impurities suspended due to convection in it that ice crystal can form on, whereas in cooler water the impurities would tend sink to the bottom?