Alright! Let's spend some money to bring my auto watering system to another stage.
Please find the items purchased for this system..
1. 150Gl water tank
2. 8mm water pipe
3. Small host connectors
4. Small volume controllers
5. Water balloon for the tank
Just connect them together and will have a 24/7 watering system for the plants.
As a backup, a water balloon is placed in the middle of the tank (where the water pressure is enough to make the system running) whenever the rain water is not sufficient to support the system.