Laying in a salt bath can also dehydrate you, a lot.

I've felt particularly grumpy after a float session a couple of times and was able to remedy this by rehydrating.

This can definitely happen after things that are supposed to be relaxing. The key is to plan your day out so you don't do anything stressful right after. (unfortunately you probably still have to drive home afterwards)

this is hilarious. sorry for laughing