If you make one, make sure you get the vinyl downspout, you won’t be able to bend the aluminum ones in this manner. If you would like, you can also get food grade NFT channels from hydroponic supply stores.
Ask Pepeor Marty a question here: https://forms.gle/Uvw3zyZ8ENyyjgjMA
Join the Keep on Growin’ FB Group, show off your gardening pictures and learn from fellow gardeners: https://www.facebook.com/groups/107573573095912
EBook shows how to grow with non circulating hydroponics: https://www.etsy.com/listing/615008659
Hydroponic nutrients and other hard to find supplies:
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Music from Epidemic Sound
On a Good Day by Johan Glossner
Split Down the Middle by Carlberg