Just like you, I’m trying to grow plants on water (Hydroponics) using the Kratky Method. Kratky Method is a low maintenance, yet effective way of growing your plants on water mixed with nutrient solutions and other mediums (e.g. Hydroton, rockwool/sponge, coco coir).
If you have experience in growing your plant through hydroponics, feel free to share your thoughts/feedback/tips so other viewers and I can learn from your best practices, too.

Upland Kangkong seeds bought at:
Music from Quik app: Feel good acoustic by Akashic Records
Jalene
