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I built this hydroponic deep water culture system for starting pepper plants. It was very inexpensive and easy to build and works well. It uses a small air pump, air stones, one-inch net cups, AeroGarden sponges (although just about any kind of growing sponge would work, ie BioDome, Rapid Rooter, Root Riot, etc… It has a built-in light stand with a Sansi 30 watt grow light.
Parts showed (or equivalent) in the video:
Commander XL 5 gallon tote – Get at Lowes
Air pump – https://amzn.to/2XNpXpB
Air stones – https://amzn.to/2TtfFfG
Sansi 30 watt grow light – https://amzn.to/2XPc8H7
Dyna-Gro 7-9-5 – https://amzn.to/2XOKz0T
Air tubing – https://amzn.to/2NV3LFI
1-inch net cups – https://amzn.to/2NV06r7
AeroGarden sponges – https://amzn.to/2TqEn0m
Rapid Rooter (cut these in quarters the long way) – https://amzn.to/2XOKzxV
1-inch bit – https://amzn.to/2NT804t
1-inch PVC pipe – get at Lowes
1-inch PVC tee – get at Lowes
Here are pics of some of the plants I transplanted out of this system.