411 REFERENCE · Wikibooks
Hydroculture/Hydro/Growbed
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
This teaches how to construct an external hydroponic growbed.
Bell siphon
Container
Pipe or gutter as a growbed
Using pvc pipe as a growbed can easily become expensive, and it contains less space than a bin for growing plants.