Ok. I think I got more confused,the coolant tends to remain just above 0,but its sporadic at best. The coolant is (as all antifreeze is) a mixture of water and in my case ethylene glycol.also I'm pretty sure that the mixture I used can't go sub zero ,as it tends to freeze (due to a poor ratio of water to antifreeze,because its cheap).
Howeaver,I see your point,If it is phase change,then what do I do about a submission I have made using this setup under watercooling,can I change it or do I have to delete it and resubmit?