Advantages of growing houseplants in water
There is an advantage to houseplants that grow in water. Many actually thrive better in water, hydroponics, type of environment. When dealing with plants in potting soil, there can be a tendency to over or under water, and to not use a proper mixture of ingredients for potting soil rooting. Another plus is that with growing these plants in straight H2O, there is no risk of having to deal with a messy container, especially if the dirt starts to fall out every time you water the houseplant. This makes it simple issue of clean-up of just water drops and not soil or other sediments.
Another plus for houseplants that grow in water, is little to no insect issues. Since the plant is directly thriving in a water environment, there is no dirt for the invading pest to walk on to get to the plant or any dirt born type of insect to create a problem.
The biggest advantage of houseplants that grows in water is that plants tend to thrive better because of better aeration of the root system than in straight soil rooting.
Growing plants in water
Some experts say using darkened glass containers usually provide the best housing for a houseplant in water ecosystem. The glass is easier to clean and does not allow for any chemicals, which can be found in plastic or ceramic containments, to bleed into the water. The darkened glass prevents a direct sunlight focus of establishing algae issues to start-up in the container.
If you are placing a plant with roots into the container, then have a good base of pebbles or gravel at the bottom. This will allow roots to have something to establish themselves to. Add the water and any nutrients to the pot, and gently shuffle the container to allow the pebbles to settle into place. (As a side note, marbles can be introduced into the container in place of pebbles to add color.)
If placing a cutting from another plant into the pot, remove about 4-5 inches of any leaves above the cutting. Then place the leafless portion into the water, have about 2-3 inches of pebbles or marbles in place and DO NOT add nutrients at this time. Allow the plant to become adapted to the environment and begins to sprout roots. Then you can consider adding proper plant food.
This is basic information on houseplants that grow in water. By establishing a proper beginning for the new plant, it can develop and thrive wonderfully for your viewing pleasure.