Martin I got that wire tied into the 3rd rail and if they don't behave I shock them good and a light comes on... OK April fools was yesterday and Bass got me...lol That is called micro tubing with a drip emitter tied into 1/2 inch poly ran along my cage which is on a timer into a hose spigot. I usually water by hand but it is convenient for me when I'm away for any length of time or when I want a nice slow watering 2-3 gal per hour. I can set time of day, length of time, and how many days per wk. They also sell different size emitters from 1-5 gal per hour and also adjustable ones, and if you have different size pots or plants that require more or less water you just change the size of the emitter. I hope that makes sense
I cut the top of the one trunk so hopefully I get more branching I will see as season progresses
Maggie they might be similar if not the same Negrome and VDB
Sal