Cryptocoryne parva: the smallest crypt
Family Araceae · Sri Lanka
The smallest Cryptocoryne — a slow, tough low-light foreground rosette.
Where it comes from
Cryptocoryne parva comes from streams in Sri Lanka, like several of its relatives. It is genuinely the smallest of the Cryptocoryne genus, staying just a few centimetres tall even when fully grown.
What to expect
It forms tight little rosettes of narrow, upright green leaves. Planted in a group it slowly knits into a low, textured foreground clump — a rare crypt small enough to use at the very front of the tank, unlike its bigger cousin Cryptocoryne wendtii.
How to keep it
Like most crypts it is undemanding on light and needs no CO2, drawing most of its food from the substrate — so root tabs and a nutrient base matter more than fertiliser in the water. Its defining trait is slowness: it can sit and sulk for weeks before it starts to spread.
| Parameter | Value |
|---|---|
| Lighting | Low to medium |
| CO2 | Not required; beneficial |
| Temperature | 22–28 °C |
| pH | 6.0–7.5 |
| Hardness | Soft to hard |
| Fertiliser | Root tabs |
| Substrate | Nutrient-rich preferred |
| Growth rate | Very slow |
| Placement | Foreground |
| Difficulty | Medium |
Where it works and how to spread it
Plant small groups across the foreground and leave them be — crypts hate being disturbed. Over months it produces side shoots on runners that you can separate once established. Do not expect a quick carpet; think of it as a slow, permanent feature.
What goes wrong
The classic crypt trap is crypt melt: after planting or a change in conditions the leaves dissolve away. Do not pull the plant — the rootstock is usually fine and regrows adapted leaves. Beyond that, only impatience really lets people down with parva.
More plants in this series
- Cryptocoryne wendtii — the larger, faster crypt
- Cryptocoryne balansae — the tall corrugated crypt
- Anubias nana — the other tough low-light plant
- Dwarf four-leaf clover (Marsilea hirsuta) — the low-tech carpet