The short answer
Algae on plants — soft fuzz, hair strands or tough black tufts — is removed by a mix of gentle hand-cleaning, trimming the worst leaves, and spot-treating stubborn types with liquid carbon. But cleaning is only half the job: algae grows on plants when light, nutrients and CO2 are out of balance, so you also need to get the plants growing healthily so they out-compete it.
Clean it off gently
How you remove it depends on the algae and the plant:
- Soft fuzz and hair algae: rub it off between your fingers, or twirl strands onto a toothbrush. On delicate leaves, be gentle so you don’t tear them.
- Badly-coated leaves: just trim them off at the base. Old, algae-covered leaves rarely recover, and removing them lets the plant put energy into clean new growth.
- Tough tufts (black beard, staghorn): spot-treat directly. Remove the plant, dab liquid carbon onto the affected spots with a syringe, wait a minute, then replant. The algae dies back over a few days.
Fix the cause so it doesn’t return
Algae keeps recolonising leaves whenever conditions favour it over the plant.
- Balance the light. Keep your photoperiod to 6–8 hours on a timer; too much light is a top trigger. See our planted-tank light picks.
- Feed the plants, not the algae. Healthy plants with balanced fertilisers and stable CO2 grow faster than algae and starve it out.
- Lower excess nutrients. Overfeeding and overstocking add nitrate and phosphate — feed less and do weekly water changes.
Tip: a graze-happy clean-up crew helps keep leaves clean. Amano shrimp and Otocinclus pick soft algae off plants without harming them.
The bigger picture
Algae on plants is almost always a balance problem, not a plant problem. Get the plants thriving and most of it fades on its own. For type-specific help, see hair algae, black beard algae, and our full how to get rid of aquarium algae guide.