Homeowner Uses Kratky Method For Hydroponics Lettuce and happily harvest them. He also explains briefly how this system works. Its a short and sweet video showcasing the results and success of it.
Video Sourced From Youtube channel listed below.
Video License: https://creativecommons.org/publicdomain/zero/1.0/deed.en CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
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Recommended Reading For You For General Understanding
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Happy Harvesting !!