Kratky is great! Remember not to fill it too much after they've used up the nutes so you don't drown the plants.
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Is there a certain pot depth you'd recommend? I imagine part of the reason is to prevent excess water wicking into the substrate in the pot, but would be concerned somewhat about accidentally air pruning roots in a gap.
2/3 of the container height is generally a good ballpark. You can also check where the air roots start and just stick to height lower than that.
I was curious how you'd float or secure the plants in the nutrient water, thanks for sharing! Wishing you many happy harvests of fresh food!