Nice betta!
Just reading your other thread - maybe just stick with your old water conditioner if this has just started happening since you changed brands, not sure why it would happen now though.
Like Devs says, it kinda depends on other factors as well like the bowl volume, how much water you change and how often, feeding regime etc. Have you changed feeds or been over feeding recently? Sometimes that can cloud things up too. It doesn't come across as too cloudy in the picture though