Wick systems and the Kratky method, explained
Two setups that move water to the roots without a pump.
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Setups with no pump
Wick and Kratky setups move water without a pump. That takes the pump out of the water. An indoor setup may still sit under a grow light with a plug nearby.
How a wick system works
In a wick system, a strip of absorbent material runs from the reservoir up into the growing medium. Water moves up the wick to the roots.
How the Kratky method works
The Kratky method is a name for a still-water setup. The plant sits in a net pot over a container of nutrient solution, and its roots reach down into it. The level drops as the plant takes up water. A glass jar with a net pot in its mouth is one example.
A light near the container
Keep plugs, cords, and connections away from water, and follow every maker's instructions. CPSC says a GFCI "is designed to protect people from severe or fatal electric shocks," and that ground fault protection is used "especially for circuit outlets in particularly vulnerable areas such as where electrical equipment is near water." Use a qualified electrician for any wiring.
What we do not say
We do not give container sizes, refill times, or nutrient strengths. Follow the nutrient label. Results vary.
This is general information, not legal, electrical, or safety advice.
Sources: CPSC, GFCI Fact Sheet (Pub. 099).
FAQ
General information only. Water and electricity are a dangerous mix: keep plugs, cords, and connections away from water and follow every maker's instructions. CPSC says a GFCI "is designed to protect people from severe or fatal electric shocks" and to test every GFCI "At least once a month." Use a qualified electrician for any wiring. Keep nutrients and other chemicals away from children and pets. In an emergency, call 911.
Next: deep water culture
Roots hang in the solution.
