API QUICK START Nitrifying Bacteria – 118ml
API® QUICK START nitrifying bacteria allows for the instant addition of fish, as it immediately starts the natural aquarium cycle with beneficial bacteria, which converts toxic ammonia into nitrite, then into harmless nitrate to help prevent fish loss in your tank. Best for use when starting a new aquarium, after water changes and filter changes, and when adding new fish to an existing aquarium. API QUICK START nitrifying bacteria may be used in both fresh and saltwater aquariums.
Add 10 ml per 10 gallons of aquarium water.
| Usage | Start new aquarium, after water or filter changes, when adding new fish |
|---|---|
| Compatibility | Freshwater and saltwater aquariums |
| Amount per 10 gallons | 10 ml |
FAQ
Can I add fish immediately after adding API QUICK START™ nitrifying bacteria to my tank?
Yes, you may add your fish to your aquarium immediately after dosing.
How long does it take for the bacteria to start converting ammonia into nitrate?
The bacteria begin working immediately upon addition and start converting ammonia into nitrite and then into nitrate within a few days.
Is API QUICK START suitable for both freshwater and saltwater tanks?
Yes, API QUICK START nitrifying bacteria may be used in both fresh and saltwater aquariums.

Gavin Forsyth –
I used this when setting up my new freshwater tank. Added the bacteria right after filling the tank and immediately added my fish. No ammonia spikes, and the water stabilized quickly. Very effective for beginners.
Eric May –
Works well after a water change. I added it to my saltwater tank and noticed a clear improvement in water stability within a week. The instructions were easy to follow.
Amelia Lyman –
Great product for new aquarium owners. I used it when introducing new fish to my existing tank. No fish died, and the water parameters stayed stable.