How many fish should I have in my biOrb 30?
You must resist the temptation to fill your aquarium with fish straight away. One small goldfish (1 to 1.5 inchesĀ) or three small shoaling fish (such as white cloud mountain minnows) can be introduced.
Wait at least 28 days before adding any more fish.
A gap of 28 days should be left between each addition of fish. Never add more than one goldfish or three small shoaling fish at a time. Buying too many fish at a time can kill the fish or at least make them very ill. establishing your aquarium
| Fish Type | Each Month | Maximum Stock (biOrb 30) |
| Fancy goldfish (basic fantails) | 1 | 2-3 |
| Small shoaling fish (minnows, danios, etc) | 3 | 12-18 |
If transferring fish from an existing aquarium to a new aquarium the fish must be moved over gradually as described above.
