I have a Tradescantia fluminensis growing in a hydroponic Kratky/ wick setup in an old bottle.

I never fill the bottle with more than 1/3 nutrient solution, but it lasts for more than a month, in winter even two.

Zero maintenance you think? Wrong! This plant is only a few months old, and growing like a weed.
I have to trim it every few weeks, and like a hydra, it regrows more twigs than I cut and gets even bushier.

The neon colors only get out if it gets enough sun, but sometimes, it’s too much, and it gets a slight sunburn.
I have to rotate it every few days to not get burnt too much on one side :D

The roots also look great

The other one is a bit younger and looks like this: