The swimming pool hadn't been used at all, so the water was still the same as it was without cleaning, but flood dragon had no requirement for the water quality, so it was fine.
The flood dragon had stayed in Gu Ning's telepathic eye space for many days. Although it couldn't absorb the magical power into its body, it was covered in it and the magical power could permeate into its body.
It wasn't easy for the flood dragon to practice its cultivation, and it had to go through tribulations to achieve its goal.
Practicing one's cultivation was against the rules of nature, so the one that wanted to do that had to survive the heavenly tribulation.
The flood dragon's aim was to become a dragon. Although it was just a step away, it was the most difficult step. It had to survive several heavenly tribulations to move that step forward!
Gu Ning didn't leave after she let the flood dragon out, but talked with it about something.