Your hydroponic way of planting always amazes me. Imagine growing plants without using soil! Those water spinach really enjoy the water and the PH balance. I usually plant water spinach using stem cuttings and I want to try this way - using seeds. Have you tried stem cuttings? Which way do they grow better? I noticed your variety has smaller leaves; mine have bigger ones.

And to that sore back? It will just go away as you harvest, lol enjoy!