medium is saturated. Drip irrigation set-ups
and instructions are available at the local
garden supply store. Suitable pumps are
sold in garden supply stores as well as
tropical fish stores. Short range timers as
well as the other supplies are all available
at high-tech indoor garden centers.
Drip irrigation systems with a reservoir
above the garden use a sump pump to
move water from the collection tray at the
bottom of the garden to the reservoir. Water
remains in the top reservoir until a valve
opens allowing it to flow through the drip
emitter tubes to the containers. Automatic
valves with timed opening and closing
cycles are available at garden supply stores
or can be put together using a closed
solenoid valve and timer. Valves are
available at plumbing supply stores.