FIELD MANUAL · ED. 01
ROOTLESSFARM // FIELD MANUAL
DOC №091SEC: GUIDESREV: 2026-05-16AUTHORED

DWC vs Kratky — Active vs Passive Hydroponics

DWC pumps oxygen continuously; Kratky lets the water level drop and exposes aerial roots. Cost, yield, failure modes, and crop fit compared.

BY ROOTLESS FARM

Side by side

FactorDWCKratky
Pumprequirednone
Power25 W0 W
Cost (per plant)$5–8$2–4
Cycle reuseyes (top-up nutrient)no (one-shot reservoir)
Best croplettuce, basil, kale, tomatolettuce, herbs
Failure speedhoursdays

Choose DWC if…

…you grow continuously, have reliable electricity, and want larger crops.

Choose Kratky if…

…you grow occasionally, want zero electricity, or teach beginners.

FAQ

2 entries
Q01Is Kratky as productive as DWC?
For lettuce and herbs in a single cycle, yes. For continuous succession or heavy feeders (tomato, pepper), DWC pulls ahead.
Q02Which fails harder?
DWC fails fast when the pump dies (24h to root rot). Kratky fails slow — the reservoir runs dry first.

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