Water parameters
Temperature22–28°C
pH6–7.5
General hardness (GH)2–12 dGH
Recommended range
Overview
Cryptocoryne lingua is a crypt from the Sarawak region of Borneo that is instantly recognized by the shape of its leaves. The leaves are thick, fleshy, bright green and spoon- or tongue-shaped, which is where its name comes from. In the aquarium it usually stays 5–10 cm tall. It spreads through underground runners and, over time, forms a dense, low clump in the foreground.
Planting and Placement
It is planted in the foreground with the roots buried and the crown exposed. If planted in small pieces 3–4 cm apart, the clump fills in faster. A nutrient-rich substrate or small pieces of root tabs speed up growth.
Care and Fertilization
- Light: Medium.
- CO₂: Not required; if available, spreading speeds up.
- Fertilizer: A root tab every 2–3 months.
- Thanks to its thick leaves it is relatively resistant to melting; it also grows easily emersed (in a humid box).
Propagation
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Common Problems
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Hobbyist notes
Things you won't find in books, learned by trial and error. The most helpful ones are on top.
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Change history and contributors
- Page created · October 16, 2026