This was an interesting hike. Lots of tree roots and muddy but not difficult. The pool was so cool. People jumping in off of rocks and scaring the crap out of me.
It's a really great trek! A bit slippery and steep but there are some ropes to hold onto. It takes less than an hour, you can rest in the shade, enjoy the views and nature.
The way goes up so you need good shoes. It takes around 20 mins from Kai Bae Elephant Camp. Take water with you. We were there at the beginning of dry season so the waterfall wasn't big, it can be completely dry though.