I was thinking to use my medical knowledge for a different purpose. The first image is for a automatic watering, using the drip chamber from the I. V. set. In the second image is the I. V. set. I use the roller for watering.
I use the needle. I will experiment further, because in a few hours, the chamber is empty of water. I must use the tray method and than use the automatic watering. That way, after the pot gets less wet, it will draw the water from the chamber.