Tiger Python in the water 50% of the time

[Kimmie]

So guys my pythons looooovees their water, but it is getting kinda colder now, and I was thinking, do they feel that it is cold or are they not that smart? I am just afraid they get a cold.
I dont know how cold the water is in the nature, my cage is the right heat, so I am not afraid of that .

Here they are




P.S I tried to put a heater in there but it broke all the time and I tried cheap and exspensive ones.