Betta Care
Bettas appear to be more popular than ever lately. I have seen a lot of the "Betta Vases" with the plant. I have also read the instructions that come with these, and some mention that the Betta may eat the plant's roots. It won't. Betta care is simple. The addition of a plant will help maintain the water quality, but it isn't a perfectly balanced ecosystem (example; fish waste does not produce any iron). The addition of a filter can also help. Again, Bettas are 'surface breathers', meaning they normally surface for air, making aerators unnecessary (but they do help anyway).
I suggest that you do not use tap water, as it is much harder that what Bettas would prefer. Do not use water from a "water softener" as this may cause an ion imbalance in the tank or bowl. I suggest that you use bottled water, distilled, DI, or Reverse Osmosis/Carbon Filtered. You'll need to reconstitute (add black mineral salts and trace elements) the distilled, RO, or DI water. I recommend and personally use Kent Betta Essential to accomplish reconstitution.
Betta's prefer water to have a general harness of 60 to 90 ppm and a carbonate hardness of 1 to 2 kH.
Tank Maintenance:
With no plant- Change approximately ½ of the water in the bowl once every 1 to 1 ½ weeks.. Fill the tank/container to leave as much water surface as possible
With plant- Change approximately ½ the water every 2 to 2 ½ weeks. Plant roots may be pruned if they grow to take up too much area.
Feed sparingly. Betta pellet food: 4 to 5 pellets 1 or 2 times a day. Bloodworms: small pinch (about 5-10 worms) or as treat, 1 or 2. Flake: 2-3 flakes. It is not necessary to feed on weekends if you aren't around.