How long will this tomato plant survive in water?

Aquaponics is a method of growing plants in media without soil. In the typical method, water from fish tanks are pumped to pans growing plants without soil. Plants absorb excess nitrates and other minerals in the water. After that it is pumped back to the fish pond and the process continues. Only extra material added to the ecosystem is the fish feed. Yesterday I pulled out this tomato plant growing in a garden pot and flushed all the mud out of its roots.

Usually when I replant a tomato plant, I take it with the soil, without disturbing the roots. This time I did not want to take the mud to the fish tank. I have placed two white garden pots in my fish tank to grow hydrilla. I placed the tomato plant in such a way that the roots are immersed in water and tied the plant to the side of the tank. You can see that money plants are already growing in the same setting. Money plants are well known to grow in this fashion. The tomato plant has survived one day in water. I will be observing further and updating as long as the plant grows well!

Another garden pot for fish and plants

This is a 23 inch garden pot without holes at the bottom and filled with water. I am growing goldfish in this garden pot. Money plants are growing well here. I do top up water when the level falls due to evaporation. Fish are fed daily with commercial feeds. There are hydrilla plants in this pot. There is no aeration system for this pot. Previous fish tank has an aeration system which runs on an electric motor. Air bubbles continuously through two porous stones immersed in water.

A new, more beautiful variety of money plant is also there. But it was planted only a few days back and is yet to grow. I expect that these plants will take away the excess nitrates in the water from fish waste.