Troubleshooting
Rotala macrandra problems — and how to fix them
Rotala macrandra (Rotala macrandra) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Stunted, deformed new tips
The classic macrandra problem, caused by CO2 swings or micronutrient shortfall. Stabilise CO2 across the full photoperiod and ensure adequate magnesium, calcium and trace elements.
Poor red colour
Needs high light, lean nitrate and good iron. Raise PAR and iron dosing; excess nitrate pushes it toward green.
Lower-leaf melt and rot
Often from low flow, shading or transition from emersed stock. Improve circulation, thin the canopy, and replant healthy tops.
Algae on broad leaves
Its large leaf surface and moderate pace invite algae if light outpaces CO2. Balance light to CO2 and keep nutrients steady.
Prevent rotala macrandra problems before they start
Most rotala macrandra issues are care-mismatch, not bad luck. Dial in the basics:
Looking for rotala macrandra in general rather than its problems? Read the full rotala macrandra care guide — light, water, soil and feeding.
Rotala macrandra problems — FAQ
Why is my rotala macrandra stunted, deformed new tips?
The classic macrandra problem, caused by CO2 swings or micronutrient shortfall. Stabilise CO2 across the full photoperiod and ensure adequate magnesium, calcium and trace elements.
Why is my rotala macrandra poor red colour?
Needs high light, lean nitrate and good iron. Raise PAR and iron dosing; excess nitrate pushes it toward green.
Why is my rotala macrandra lower-leaf melt and rot?
Often from low flow, shading or transition from emersed stock. Improve circulation, thin the canopy, and replant healthy tops.
Why is my rotala macrandra algae on broad leaves?
Its large leaf surface and moderate pace invite algae if light outpaces CO2. Balance light to CO2 and keep nutrients steady.