Root Rot In Leca/Semi-Hydro on monstera thai constellation
What's Happening
Thai Constellation water roots in LECA require dissolved oxygen levels above 6mg/L. When water levels are too high (above 1/4 pot height) or stagnant, anaerobic conditions develop. Unlike soil root rot (fungal), LECA rot is hypoxic suffocation. The fine, propagation-developed water roots are particularly vulnerable to oxygen shock post-transplant.
How to Fix It
- 1
Lower water level to 1-2 inches maximum - roots should not sit in constant water
- 2
Install air pump with air stone for continuous oxygenation - non-negotiable for recovery
- 3
Add 3% hydrogen peroxide at 1-2ml/L weekly to kill anaerobic bacteria (temporary measure)
- 4
Use taller LECA pots to maximize the dry zone above water
- 5
Change reservoir water every 5-7 days with oxygenated (left out 24hr) water
How to Prevent It
Keep water level below root line; install passive or active aeration; monitor with dissolved oxygen test strips quarterly; maintain water temperature 18-24°C (cold water holds more oxygen); use clear containers to visually monitor root health without disturbance.
Related Problems
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