- BIO-Spira makes your marine aquarium fish-safe instantly.
- The live bacteria start working immediately to provide a safe and healthy environment for your fish without the long wait.
- BIO-Spira can also be used after a water change, when adding new fish or after medicating.
- 100 mL size is good for 30 gallon tanks
- 250 mL size is good for 75 gallon tanks