Betta fish are easy to keep and they can be kept in less space then a traditional tank takes up. On top of that, you can create a beautiful set up complete with a live plant and a happy beautiful fish.
Gather materials. With a lot of different choices out there you have to figure out what works best for your needs and desires.
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The Jar. One of the first parts is choosing a great jar. You want one that has a small neck and a large bowl region (after all the larger the space the more swimming room your fish has). To pull this off you want it to be at least 11" tall and hold at least 2/3 of a gallon of water. There are beta vase kits that make this really easy and come with the jar, instructions, and a plastic tray for your plant.
Decorative stones and ribbon. You don't have to have either, the stones help keep it clean by trapping waste and the ribbon is a decorative touch. You can color coordinate them with each other as well as with your fish.
The Plant. You will want a small philodendron or peace lily. Both these plants are safe and usually easy to find.
Once you have your items chosen you will want to remove the plant from it's package and start soaking the roots to cleanse all the soil away. Leave those soak while finishing the rest of the details.
Wash your stones and jar in warm water to remove dirt and glass particles.
Place half of the decorative stones in the bottom of the jar.
Fill the jar with water. You will want to add a few drops of water conditioner (for fish) to this or use bottled water to make sure there isn't any chlorine in it which can harm your fish.
Add your fish. Using a net, gently scoop your fish up and place it in the jar.
Wrap the ribbon around the neck of the jar. You can either knot it, tie it in a bow, or tuck it under itself to hold it in place.
Cut a whole in the plastic tray that came with the jar or a clear plastic cup if you don't have a tray with your jar. This should be large enough to stick the roots of the plant in, but small enough that the plant isn't going to fall into the water.
Finish rinsing the roots as best you can.
Place the plant in the cup or tray with the roots through the whole in it.
Place the plant in the jar with the roots in the water.
Add decorative stones to the tray or cup. This gives it a more finished look and also helps hold the tray or cup down so that it is in place.