I'd say a hot spot can go up to 88, but bloods really prefer to be in the mid 80's.

If you are concerned about the urates becoming a block, you can give her the option soak in a tub of water in the enclosure.

If I can find the post, I will show you what happens when urates really do block up a snake. It's not pretty, but it does end well.

Here we go...
http://ball-pythons.net/forums/showt...ighlight=urate