My son got a beta fish about 2 weeks ago. It was in one of those little bowls. I got tired of changing the nasty water every two days (and i felt sorry for the little thing) so i bought a 1 1/2 gallon tank from target. It is nothing fancy but it has a filter and a little light on top. My son was THRILLED. I followed the directions on setting up the tank. I filled it with tap water and put the fish in. He swam around fine for the first hour or so. Then he sank to the bottom and died. Any idea what went wrong? Keep in mind, the water I used to fill the tank is the exact same water I have been using every two days to clean and refill his his bowl. I noticed that there seemed to be a lot of flow coming form the filter. I turned it off after about 30 minutes because the fish started getting lethargic.
I am going to go to the store tomorrow and pick up another one. Any tips?