Plant comparison
Ammannia Gracilis vs Monte Carlo
How the Ammannia Gracilis and Monte Carlo compare on care, size, water and temperament, and which plant suits your tank.
By Mike ElmiraUpdated
TL;DR, Ammannia Gracilis vs Monte Carlo
The Ammannia Gracilis and the Monte Carlo come up together a lot when people are choosing a plant, and they are close enough to weigh side by side. Both are happy somewhere around 22 to 26 °C and pH 6 to 7.5, so a single tank can suit either one. Neither is harder than the other to keep, so the choice comes down to look and stocking rather than skill. Read the full care notes on each below and pick the one whose look and pace fit the tank you're building.
Group compatibility overview
Excellent fit
Every key parameter overlaps and no major conflicts surfaced.
Temperature
- Ammannia Gracilis22–28 °C
- Monte Carlo20–26 °C
pH
- Ammannia Gracilis5.5–7.5
- Monte Carlo6–7.5
Hardness
- Ammannia Gracilis2–15 dGH
- Monte Carlo1–10 dGH
Full attributes
Every parameter, side by side| Parameter |  PlantAmmannia GracilisAmmannia gracilis |  PlantMonte CarloMicranthemum tweediei |
|---|---|---|
| Category | Plant | Plant |
| Origin | West Africa, Senegal to Cameroon | Argentina |
| Family | Lythraceae | Linderniaceae |
| Temperature | 22–28 °C | 20–26 °C |
| pH | 5.5–7.5 | 6.0–7.5 |
| Hardness (dGH) | 2–15 | 1–10 |
| Flow rate | Low to Medium | Low to Medium |
| Max height | 30–60 cm | 3–5 cm |
| Difficulty | 3 / 5 | 3 / 5 |
| Light | High | Medium to High |
| CO₂ | Required | Recommended |
| Growth rate | Medium | Medium |
Frequently asked questions
Direct answers to the questions search engines and AI assistants surface most often about this species.
Can you keep Ammannia Gracilis and Monte Carlo together?
Yes. Their temperature and pH ranges overlap around 22 to 26 °C and pH 6 to 7.5, so one set of water conditions keeps both comfortable. Match group sizes and cover the usual planted-tank basics and they share a tank fine.
Which is easier to keep, the Ammannia Gracilis or the Monte Carlo?
They sit at the same care level, both middle-of-the-road, so neither is the obvious beginner pick. The decision is really about the look you're after.
Do Ammannia Gracilis and Monte Carlo need the same water?
Close to it. Aim for 22 to 26 °C and pH 6 to 7.5 and you're in the shared sweet spot for both. Full ranges are in the table above.
What's the main difference between the Ammannia Gracilis and the Monte Carlo?
Placement and light. The Ammannia Gracilis works as background, the Monte Carlo as foreground, and their light needs differ, which is covered in the table.