Plant comparison
Bacopa Caroliniana vs Bacopa Monnieri
How the Bacopa Caroliniana and Bacopa Monnieri compare on care, size, water and temperament, and which plant suits your tank.
By Mike ElmiraUpdated
TL;DR, Bacopa Caroliniana vs Bacopa Monnieri
The Bacopa Caroliniana and the Bacopa Monnieri are close cousins, both in the Bacopa group, so at a glance they ask for a lot of the same things. Both are happy somewhere around 22 to 28 °C and pH 6.5 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. In a low-tech, low-light setup the Bacopa Caroliniana is the safer bet; the other really wants brighter light to look its best.
Group compatibility overview
Excellent fit
Every key parameter overlaps and no major conflicts surfaced.
Temperature
- Bacopa Caroliniana18–28 °C
- Bacopa Monnieri22–28 °C
pH
- Bacopa Caroliniana6–8
- Bacopa Monnieri6.5–7.5
Hardness
- Bacopa Caroliniana3–18 dGH
- Bacopa Monnieri5–18 dGH
Full attributes
Every parameter, side by side| Parameter |  PlantBacopa CarolinianaBacopa caroliniana |  PlantBacopa MonnieriBacopa monnieri |
|---|---|---|
| Category | Plant | Plant |
| Origin | Southeastern USA | Cosmopolitan tropics (including South African wetlands) |
| Family | Plantaginaceae | Plantaginaceae |
| Temperature | 18–28 °C | 22–28 °C |
| pH | 6.0–8.0 | 6.5–7.5 |
| Hardness (dGH) | 3–18 | 5–18 |
| Flow rate | Low to High | Low to Medium |
| Max height | 20–40 cm | 10–30 cm |
| Difficulty | 1 / 5 | 1 / 5 |
| Light | Low to High | Medium to High |
| CO₂ | Optional | Optional |
| Growth rate | Medium | Slow to Medium |
Frequently asked questions
Direct answers to the questions search engines and AI assistants surface most often about this species.
Can you keep Bacopa Caroliniana and Bacopa Monnieri together?
Yes. Their temperature and pH ranges overlap around 22 to 28 °C and pH 6.5 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 Bacopa Caroliniana or the Bacopa Monnieri?
They sit at the same care level, both very easy, so neither is the obvious beginner pick. The decision is really about the look you're after.
Do Bacopa Caroliniana and Bacopa Monnieri need the same water?
Close to it. Aim for 22 to 28 °C and pH 6.5 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 Bacopa Caroliniana and the Bacopa Monnieri?
Placement and light. The Bacopa Caroliniana works as midground or background, the Bacopa Monnieri as midground or background, and their light needs differ, which is covered in the table.