Cryptocoryne balansae: the corrugated background crypt
Family Araceae · mainland SE Asia
Long, corrugated ribbon leaves that sway like a background plant.
Where it comes from
Cryptocoryne balansae (often sold within the Cryptocoryne crispatula complex) grows in flowing streams across mainland Southeast Asia, some of them over limestone — which is why, unlike many plants, it tolerates and even enjoys harder, alkaline water.
What to expect
It sends up long, narrow, strongly corrugated (hammered) leaves that can reach the surface and trail, swaying in the flow like a background stem plant despite being a rosette. Planted in a row it makes a beautiful moving green backdrop.
How to keep it
It is a typical easy crypt: no CO2, tolerant of low light, and a heavy root feeder that loves a nutrient substrate and root tabs. Its stand-out feature is hard-water tolerance, making it a rare good background plant for tap water that is naturally hard.
| Parameter | Value |
|---|---|
| Lighting | Low to high |
| CO2 | Not required |
| Temperature | 22–28 °C |
| pH | 6.0–7.5 (tolerates hard water) |
| Hardness | Soft to hard |
| Fertiliser | Root tabs |
| Substrate | Nutrient-rich preferred |
| Growth rate | Slow to moderate |
| Placement | Background |
| Difficulty | Easy |
Where it works and how to spread it
Plant along the back of the tank and give it room — it spreads by runners into a dense stand over time. Like all crypts it resents disturbance, so pick its spot and leave it. Separate runners once well rooted to propagate.
What goes wrong
Expect crypt melt after planting or big water changes — leave the roots in place and new leaves follow. Very long leaves can also shade plants beneath them, so thin the stand if it gets too dense.
More plants in this series
- Cryptocoryne wendtii — the compact foreground crypt
- Cryptocoryne parva — the smallest crypt
- Vallisneria spiralis — the other tape-leaved background plant
- Aponogeton crispus — the crinkled bulb background plant