Can cardinal tetras and platies live together?
With care
Cardinal tetras and platies can share a tank, but there is something to watch.
Why
- Their pH ranges only meet at 7.0, which leaves no margin.
What each one needs
| Cardinal tetra | Platy | Both | |
|---|---|---|---|
| Temperature | 73–84°F (23–29°C) | 70–80°F (21–27°C) | 73–80°F (23–27°C) |
| pH | 5.0–7.0 | 7.0–8.2 | 7.0–7.0 |
| Minimum tank | 20 gal (76 L) | 10 gal (38 L) | 20 gal (76 L) |
| Keep at least | 6 | 3 | |
| Adult size | 2 in (5.1 cm) | 2.5 in (6.4 cm) |
The smallest tank for both
A 20 gallons (76 L) tank holds 6 cardinal tetras and 3 platies at about 53% of its stocking limit, which leaves room for more.