Cleaning Out My Male Betta's Fish Bowl?

I got a betta fish 2 days ago, he has not been eating right so I am trying to solve that mystery. But as of now, from what others have told me, food in the bottom of his bowl can rot and cause bacterial infections, the water is kind of cloudy so I think I'm going to clean it today, but.. should I just wash the... show more I got a betta fish 2 days ago, he has not been eating right so I am trying to solve that mystery. But as of now, from what others have told me, food in the bottom of his bowl can rot and cause bacterial infections, the water is kind of cloudy so I think I'm going to clean it today, but.. should I just wash the rocks and re-use them or put new ones in? I only bought a small bag and a small glass bowl for him, I used half the bag of rocks. Should I put new ones in everytime? The bag only is able to re-use for new ones 2 times before I have to buy a new bag.
3 answers 3