Healthy roots are usually firm and pale, although some nutrients can stain them. Soft texture, slime, odor, and collapsing plants point to a root-zone problem that needs prompt attention.
Immediate checks
- Confirm pumps, air stones, drains, and return lines are working.
- Measure solution temperature and increase aeration where oxygen may be low.
- Remove dead root material and clean contaminated equipment without damaging healthy roots.
- Review sanitation, light leaks into the reservoir, and any recent organic additions.
Prevention
Keep the reservoir covered, equipment clean, temperatures appropriate for the crop, and water moving reliably. Quarantine affected plants when cross-contamination is possible.