API Quick Start
API Quick Start is an all-natural method to convert toxic ammonia into nitrites, then nitrates in freshwater or saltwater aquariums. Quick Start contains nitrifying bacteria to prevent new tank syndrome and instantly starts the natural aquarium cycle, allowing for immediate addition of fish.
Avoid unnecessary fish loss by using Quick Start when:
- Ammonia or nitrite are detected
- Starting a new aquarium
- Adding new fish
- Performing a water change
- Changing water conditions
| Usage Instructions | Amount |
|---|---|
| Freshwater aquarium | 10 ml per 10 gallons |
| Saline aquarium | Double dose (20 ml per 10 gallons) |
| Cap size | API Dosing Cap included |
| Storage | Store in a cool, dry place. No refrigeration required. |
FAQ
How long does it take for API Quick Start to start converting ammonia?
The nitrifying bacteria in Quick Start begin working immediately upon addition to the aquarium water. Visible improvement in ammonia and nitrite levels can typically be observed within 24 to 48 hours.
Can I use API Quick Start in both freshwater and saltwater tanks?
Yes, API Quick Start is effective in both freshwater and saltwater aquariums. For saltwater, the recommended dose should be doubled.
Is the product safe for fish during use?
Yes, API Quick Start is safe for fish. It contains natural nitrifying bacteria that help maintain a healthy nitrogen cycle without harming aquatic life.

Adam Lambert –
I used Quick Start when setting up my new freshwater tank. The ammonia levels dropped quickly after the first dose. My fish stayed healthy and active from day one. Easy to measure with the dosing cap and no fish died during the transition.
Connor Rees –
Great product for new aquarium owners. I added fish right after using it and didn’t see any ammonia spikes. It works well in a 55-gallon tank. The instructions are clear and the cap makes dosing simple.
Andrew Welch –
After a water change, I noticed nitrite levels rising. I used Quick Start and the cycle stabilized within a day. My tank has been stable since then. Highly recommend for both new and established tanks.
Pippa Hardacre –
Used it when adding new fish to my saltwater tank. Dosed as instructed and saw a noticeable drop in ammonia. The bacteria seem to establish quickly and maintain balance.