This video shows how to grow lettuce in glass mason jars hydroponically, meaning in water instead of in soil. I use the Kratky method, which does not need an air pump. A simple glass jar is good enough to grow the lettuce as you will see. The seeds sprout very quickly, and in just 5 weeks I have a beautiful harvest! After another 2 weeks the leaves grow back and I am able to harvest a second time! Very delicious both times!
You can find the items I use in this video on Amazon here:
Grow Lights: https://amzn.to/2syY5r5
Nutrients: Grow Big by Fox Farms: https://amzn.to/2YwJpqe
Or Masterblend Formula: https://amzn.to/2WfjZNo
Rockwool Cubes: http://amzn.to/2puNhZ6
Clay Pebbles: http://amzn.to/2G0AcOf
Mason Jars (make sure they are wide mouth): http://amzn.to/2GeoN0E
Net Cups 3 inch: https://amzn.to/2SpJlFD
Disclaimer: Some of the above links are Amazon affiliate links and I receive a small commission with each sale at no extra cost to you. Thanks so much for the support.