This is posted in the wrong forum (should be in general pythons).
However- The solid white chalky stuff are urates. Its a normal solid waste product comprised of the minerals and salts in the urine. Dont try to force any out that you feel in the snake. The savu is hiding out in its bowl because its too hot. 85 ambient plus an additional hot spot it way too hot and the snake is attempting to cool off with a dip in the pool. And further, you are overfeeding. One mouse, the diameter of the snake, once a week is more than enough for a savu.
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- Lon D.