Help starts the natural aquarium cycle with beneficial bacteria.
API® Quick Start 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 may be used in both fresh and saltwater aquariums.
Dosage:
| Volume | Treats Up To |
|---|---|
| 118ml | 920L |
| 237ml | 1880L |
FAQ
What does QUICK START do?
QUICK START introduces beneficial bacteria that convert toxic ammonia into nitrite and then into harmless nitrate, helping to establish a stable aquarium cycle and reduce the risk of fish loss.
Can I use API Quick Start in a saltwater aquarium?
Yes, API Quick Start may be used in both fresh and saltwater aquariums.
How much bacteria does 118ml provide?
118ml treats up to 920L of aquarium water and introduces beneficial bacteria to support the nitrogen cycle.

Gabrielle MacDonald –
I used this when setting up my new freshwater tank. The bacteria established quickly after adding it, and my fish didn’t show any signs of stress. It made the transition much smoother than expected.
Nicola Anderson –
After a major water change, I added Quick Start to help restart the cycle. The tank stabilized within a few days, and I didn’t have to worry about ammonia spikes when introducing new fish.
Natalie Terry –
Great product for both new and existing tanks. I used it after replacing my filter and noticed a clear improvement in water quality within a week. Works well in both freshwater and saltwater setups.