I sold them a tray of live daikon radish microgreens and they haven't used it yet. They are still alive and even a week later, when harvested will be perfectly fresh. Simply swapping the water in the bottom tray once every two days is all they've had to do, placed near a window. This hasn't required any refrigeration at all. I think they are basically locked in stagnation because they're nutrient deprived, but have enough just to survive at this stage. As far as product shelf life goes, this is pretty amazing.
Just watch for mold growth and rinse well before eating.
Yes I recommend doing a water swap once every two days, keeping only a thin layer of water in the bottom tray for the tips of the roots to touch. This makes it very difficult for mold to grow given that this doesn't use any grow medium, similar to kratky style. At this stage, the seeds are never submerged. I personally don't rinse them before eating and have never had any issues. During the growing process I use hydrogen peroxide in the soak, and spray diluted a couple times throughout the process.
Sounds like you have it dialed in 👍
Thanks, almost. I'm still making plenty of mistakes especially during the soak/blackout period. After they sprout though it's smooth sailing every time.