Anubias is famously tough, so when its leaves start showing holes, brown edges, black spots or pale patches, something in the tank is usually out of balance. The good news is that most Anubias leaf problems have a clear cause and a simple fix. Use this diagnosis guide to match what you see to the likely cause.
Quick answer: Pinholes in Anubias leaves usually mean potassium shortage; black or green spots are algae from too much light; yellow or pale new leaves point to low nutrients or iron; brown, mushy leaves with a soft rhizome mean rhizome rot, usually from burying it. Fix the cause (light 6–8 hours, weekly complete fertiliser, rhizome above the substrate), remove badly damaged leaves, and new leaves will grow in healthy.
Anubias leaf problem diagnosis chart
| What you see | Likely cause | Fix |
|---|---|---|
| Small pinholes in older leaves | Potassium shortage | Dose a complete liquid fertiliser weekly |
| Black or dark green spots, fuzzy tufts | Algae (green spot or black beard) from strong or long lighting | Shade the plant, cut light to 6–8 hours, wipe leaves |
| Pale or yellow new leaves | Low nutrients, often iron or nitrogen | Add fertiliser with iron and trace elements |
| Old leaves turning yellow one at a time | Natural ageing of old leaves | Normal; trim them off |
| Brown, mushy leaves and soft rhizome | Rhizome rot, usually from burying it | Cut away soft rhizome, re-attach above substrate |
| Brown, crispy edges (out of water) | Low humidity in emersed setups | Raise humidity or return underwater |
| Transparent, melting leaves after planting | Adjustment after shipping or emersed growth | Keep conditions stable; new leaves follow |
| Leaves torn or chewed | Fish or snails nibbling, or rough handling | Check tank mates; move plant |
Holes in Anubias leaves
Pinholes that start small and grow are the classic sign of potassium deficiency. Because Anubias grows so slowly, each leaf stays in the tank for months, so even a mild nutrient shortage eventually shows. Use a complete all-in-one liquid fertiliser once a week after water changes. Existing holes will not heal, but new leaves will come in whole. See how often to fertilise aquarium plants.
Black spots and algae on Anubias
Black beard algae and green spot algae love Anubias leaves because they stay in the tank so long. The main causes are strong light, long photoperiods and unstable nutrients. Move the plant into partial shade, run lights for 6–8 hours on a timer, and gently wipe or trim affected leaves. Nerite snails and Amano shrimp help keep leaves clean. Full guide: removing algae from Anubias.
Yellow or pale Anubias leaves
If new leaves come in pale or yellow, the plant is short of nutrients, often iron or nitrogen, which is common in lightly stocked or new tanks. If only the oldest outer leaves yellow one at a time while new growth is healthy, that is normal ageing. If many leaves yellow quickly and the rhizome feels soft, see why Anubias melts or turns yellow.
Brown, mushy leaves and rhizome rot
A soft, brown or bad-smelling rhizome is the most serious Anubias problem. It almost always happens when the rhizome is buried in gravel or soil. Lift the plant, cut away all soft tissue with clean scissors until only firm green rhizome remains, and tie or glue the healthy section to wood or rock. See how to attach Anubias correctly.
Prevention checklist
- Keep the rhizome above the substrate, attached to hardscape.
- Run low to medium light for 6–8 hours a day.
- Dose a complete liquid fertiliser weekly.
- Keep water at 22–28 °C and pH around 6.0–7.5.
- Do weekly water changes and keep flow gentle over the leaves.
If your plants show nutrient shortages, a complete two-part liquid fertiliser such as Green Plus + Trace covers macro and micronutrients in low-tech tanks.
More Anubias troubleshooting:
Plants in this guide
Grown in Surat · graded by leaf count and photographed before dispatch · live-arrival guarantee on every order · ₹99 shipping, free from ₹2,000
Price range: ₹ 90 through ₹ 250
Price range: ₹ 90 through ₹ 250
Price range: ₹ 90 through ₹ 250
₹ 250
Frequently asked questions
Will damaged Anubias leaves recover?
No. Holes, algae damage and brown patches stay on existing leaves. Fix the cause, trim the worst leaves, and new healthy leaves will replace them over the following weeks.
Should I cut off yellow Anubias leaves?
Yes, once a leaf is mostly yellow or damaged, trim it at the base of the stem. It will not turn green again and removing it keeps the plant tidy.
