Cryptocoryne Undulata
Cryptocoryne undulata
Also known as Undulate Crypt, Undulata Crypt
Plantae›Tracheophyta›Magnoliopsida›Alismatales›Araceae
📍 Sri Lanka
A versatile mid-sized Cryptocoryne with lanceolate leaves that have attractively undulated margins. Colouration ranges from olive-green to reddish-brown depending on light intensity and water conditions. It is one of the hardiest Cryptocoryne species, tolerating a wider range of pH and hardness than most.
Community Photos
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by @isabellekaulback
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Tanks keeping this 🌿
Growing in 2 tanksCommunity tanks featuring Cryptocoryne Undulata.
Compatible Livestock
Peaceful algae-eaters that won't damage plant leaves and help maintain tank cleanliness
Small, gentle fish that provide movement without disturbing rooted plants
Beneficial invertebrates that graze algae and won't uproot or consume healthy plant tissue
Excellent companion plant with similar low-light tolerance and slow growth rate
Complementary foreground/midground plant that creates natural-looking planted layouts
Creates attractive carpet effect in foreground; slightly higher light needs but compatible in mixed setups
Common Diseases
Cryptocoryne Rot (Melt)
Rapid leaf deterioration, blackening stems, plant disintegration within days to weeks
Remove affected leaves immediately, improve water circulation, perform 25-30% water changes, ensure stable parameters (pH 6.0-8.0, temperature 22-28°C), and avoid sudden environmental changes
Nutrient Deficiency
Yellowing or pale leaves, stunted growth, leaf holes, reduced leaf size
Implement regular fertilization with all-in-one liquid fertilizers or root tabs; ensure adequate lighting (low-medium); test water parameters and adjust if needed
Algae Overgrowth
Green, brown, or black algae coating leaves and stems, reduced plant vigor
Reduce light duration to 6-8 hours daily, increase water changes, add algae-eating fish or shrimp, manually remove visible algae, and maintain balanced nutrient levels
Bacterial Leaf Spot
Brown or black spots on leaves with yellow halos, progressive leaf damage
Remove severely affected leaves, improve water quality through frequent partial water changes, ensure good water circulation, and avoid overcrowding
Tips from the community 💡
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Quick Facts
- co2
- Not required
- light
- Low–Medium
- placement
- Foreground–Midground
- tank size
- 10 gallons minimum
- growth rate
- Slow
Water it likes
- ph
- 6.0–8.0
- hardness
- 2–20 dGH
- temperature
- 72–82°F (22–28°C)
Legality
No state or federal restrictions on record for this species.
Not legal advice, and possibly incomplete or out of date. Rules vary by state and locality and change over time — always confirm the current regulations with your state wildlife or agriculture agency before buying, keeping, or shipping this species.