This is the first post with answers for december.
Pruning hydroponic tomato plants
Pruning tomato plants in hydroponics is the same as you do when they are in soil. You just have to cut the plants that grow between thee leaves and the stem.
You can grow spinach in hydroponics too. I’ve grown a few in hydroponics myself.
I don’t know exactly what the person was looking for. But I’ve read and article a few months ago about this hydroponic system. And it was invented by an Japanese.
That was all the post I could answer for today. Will be answering more searches on December 31.