FREE Shipping on your first order. Details & FREE Returns
Return this item for free
  • Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition and get a full refund: no shipping charges
  • Learn more about free returns.
How to return the item?
Arrives: July 15 - 18
Fastest delivery: Friday, July 10 Details
In Stock.
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Ships from and sold by Amazon.com.

Unlock 15% savings

Save 15% when you receive 5 or more products in one auto-delivery to one address. Currently, you'll save 5% on your Sep 9 delivery.

Choose how often it's delivered

From once every 2 weeks to once every 6 months

Skip or cancel any time

We'll send you a reminder before each delivery.
Save 5% now and up to 15% on repeat deliveries.
• No fees
• Cancel anytime
Learn more
Get it Wednesday, Jul 15
In Stock.
Deliver every:
Ships from and sold by Amazon.com
Other Sellers on Amazon
Add to Cart
$15.67
+ Free Shipping
Sold by: Josh's Frogs
Add to Cart
$16.48
+ Free Shipping
Sold by: xssential
Add to Cart
$15.67
+ $6.99 shipping
Sold by: Petco

API Quick Start Nitrifying Bacteria, for Freshwater and Saltwater Aquarium

by API
4.6 out of 5 stars 1,221 ratings
Amazon's Choice recommends highly rated and well-priced products.
Amazon's Choice for "aquarium supplies and equipment"

List Price: $22.49
Price: $13.34 FREE Shipping on your first order. Details & FREE Returns
Return this item for free
  • Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition and get a full refund: no shipping charges
  • Learn more about free returns.
How to return the item?
You Save: $9.15 (41%)
16-Ounce
Freshwater
  • Contains one (1) API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria 16-Ounce Bottle
  • Allows instant addition of fish when starting a new aquarium
  • Reduces compounds harmful to fish when used routinely
  • Helps prevent fish loss in freshwater and saltwater aquariums
  • Use when starting a new aquarium, when adding new fish and when changing water and filter media
New (8) from $15.67 + FREE Shipping

PillPack by Amazon Pharmacy
Your medication, delivered Learn more >

Frequently bought together

  • API Quick Start Nitrifying Bacteria, for Freshwater and Saltwater Aquarium
  • +
  • API Stress Coat Water Conditioner, Makes tap Water Safe, Replaces fish's Protective Coat Damaged by handling or Fish Fighting, Use When Adding or Changing Water, Adding Fish and When Fish are Injured
  • +
  • API ACCU-CLEAR Freshwater Aquarium Water Clarifier
Total price: $27.96
Buy the selected items together

Special offers and product promotions

Size: 16-Ounce | Style: Freshwater

Have a question?

Find answers in product info, Q&As, reviews

There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews

Your question may be answered by sellers, manufacturers, or customers who purchased this item, who are all part of the Amazon community.

Please make sure that you are posting in the form of a question.

Please enter a question.


From the manufacturer

Feed Your Fish Daily

Feed your fish twice daily with API Fish Food which contains nutritionally enhanced proteins, allowing for easy uptake of nutrients and maximum absorption, resulting in less excrement for clear, clean water. Take time to observe fish to ensure they are active & healthy and be sure to check water temperature.

FEED FISH DAILY

TEST WATER QUALITY WEEKLY

CHANGE 25% WATER EVERY 2 WEEKS

RESTORE ECOSYSTEM MONTHLY

API master test kit strip tube freshwater water checking monitoring fixing testing levels ph nitrite reducer remover aquarium tank bowl clean cleaning clear maintenance sludge muck accessories benefici green algae bloom string hair plant safe treatment algaecide growth control block reduce remove conditioner tap city rural aloe vera damage fin skin disease chlorine toxic neutralize slime synthet water conditioner new fish prevent dead loss kill start up ammonia bacteria natural all-natural antibacteria infection repairs rot tail eye cloud mouth fungus remedy ulcers wounds injured
API TEST KITS API STRESS ZYME API ALGAEFIX API STRESS COAT API QUICK START API MELAFIX
Use Weekly Helps monitor water quality Keeps aquarium clean Controls algae growth
Use Every 2 Weeks Makes tap water safe when changing water Restores the ecosystem to help prevent fish stress
Use Monthly Restores the ecosystem to help prevent fish stress
Use When Adding New Fish Prevents disease breakout

Product description

Size:16-Ounce  |  Style:Freshwater

Product Description

In a new aquarium, harmful ammonia and nitrite build up from fish waste, often resulting in fish loss or “new tank syndrome”. The unique, patented nitrifying bacteria in API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria are scientifically proven to quickly consume ammonia and nitrite to help prevent fish loss. API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria allows immediate addition of fish to a new freshwater or saltwater aquarium as it immediately starts the aquarium cycle. This treatment also helps to maintain an active biological filter in an established aquarium for healthy water conditions. API QUICK START contains live, nitrifying bacteria. With API Aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For over 50 years, API has been creating innovative, research-driven solutions that make it easier to care for your fish and aquarium. API Aquarium Treatment Supplies are designed to work in conjunction with each other to provide best results to control algae, promote healthy bacterial growth and help control and cure fish diseases and conditions such as ich and fin rot. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. With API, you can spend more time admiring your fish, and less time scrubbing your tank. Make sure to use all products as directed in order to ensure the best results.

Amazon.com

Aquarium Nitrifying Bacteria


Product details

Size: 16-Ounce | Style: Freshwater

Important information

Safety Information

Please Read Instructions Before Use

Directions

Use when starting an aquarium, adding fish, changing water or filter media, after medicating, or when ammonia or nitrite are detected. Shake well, then add 2 tsp. (10 ml) per 10 gallons (38 L) of water. For saltwater aquariums, double the dose. Store in a cool, dry place.


Compare with similar items


API Quick Start Nitrifying Bacteria, for Freshwater and Saltwater Aquarium
API TAP Water Conditioner, Instantly neutralizes Chlorine, chloramines and Other Chemicals to Make tap Water Safe for Fish, Highly Concentrated, Use When Adding or Changing Water and When Adding Fish
API Stress Coat Water Conditioner, Makes tap Water Safe, Replaces fish's Protective Coat Damaged by handling or Fish Fighting, Use When Adding or Changing Water, Adding Fish and When Fish are Injured
Seachem Prime Fresh and Saltwater Conditioner
API Stress Coat Water Conditioner, Makes tap Water Safe, Replaces fish's Protective Coat Damaged by handling or Fish Fighting, Use When Adding or Changing Water, Adding Fish and When Fish are Injured
API ACCU-CLEAR Freshwater Aquarium Water Clarifier
Customer Rating 4.6 out of 5 stars (1221) 4.7 out of 5 stars (2504) 4.8 out of 5 stars (301) 4.8 out of 5 stars (6999) 4.8 out of 5 stars (2780) 4.5 out of 5 stars (1161)
Price $13.34 $6.64 $17.88 $13.99 $8.08 $6.54
Shipping FREE Shipping on your first order. Details FREE Shipping on your first order. Details FREE Shipping on your first order. Details FREE Shipping on your first order. Details FREE Shipping on your first order. Details FREE Shipping on your first order. Details
Sold By Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com
Item Dimensions 2.50 x 2.50 x 8.75 inches 2.50 x 2.50 x 8.75 inches 7.88 x 2.50 x 8.88 inches 6.60 x 2.50 x 2.30 inches 5.00 x 1.00 x 5.00 inches 2.00 x 2.00 x 7.50 inches

Customer Questions & Answers

Customer reviews

4.6 out of 5 stars
4.6 out of 5
1,221 customer ratings
How does Amazon calculate star ratings?
Reviewed in the United States on June 21, 2018
Size: 16-OunceStyle: FreshwaterVerified Purchase
289 people found this helpful
Comment Report abuse
Reviewed in the United States on October 12, 2019
Size: 16-OunceStyle: Starter bundle (3-pack)Verified Purchase
20 people found this helpful
Comment Report abuse
Reviewed in the United States on January 1, 2019
Size: 16-OunceStyle: FreshwaterVerified Purchase
26 people found this helpful
Comment Report abuse
Reviewed in the United States on June 27, 2016
Size: 16-OunceStyle: FreshwaterVerified Purchase
28 people found this helpful
Comment Report abuse
Reviewed in the United States on August 22, 2019
Size: 16-OunceStyle: FreshwaterVerified Purchase
9 people found this helpful
Comment Report abuse

Top international reviews

Richard D.
4.0 out of 5 stars very quick startup of new tanks
Reviewed in the United Kingdom on August 25, 2017
Size: 8-OunceStyle: FreshwaterVerified Purchase
10 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
Dee
4.0 out of 5 stars Doest work without a source of amonia!
Reviewed in the United Kingdom on October 5, 2019
Size: 4-OunceStyle: FreshwaterVerified Purchase
2 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
M. CHAPMAN
2.0 out of 5 stars Didn't particularly work
Reviewed in the United Kingdom on January 31, 2019
Size: 8-OunceStyle: FreshwaterVerified Purchase
5 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
Student
4.0 out of 5 stars Worked for me when overusing it *not for insta stock
Reviewed in the United Kingdom on March 14, 2019
Size: 8-OunceStyle: FreshwaterVerified Purchase
Sending feedback...
Thank you for your feedback.
Report abuse
MDS
5.0 out of 5 stars Great
Reviewed in the United Kingdom on July 27, 2016
Size: 4-OunceStyle: FreshwaterVerified Purchase
6 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
Raziel R.
5.0 out of 5 stars Cycling tank problems sorted.
Reviewed in the United Kingdom on September 11, 2017
Size: 8-OunceStyle: FreshwaterVerified Purchase
4 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
IZZY G
5.0 out of 5 stars Great
Reviewed in the United Kingdom on August 31, 2017
Size: 8-OunceStyle: FreshwaterVerified Purchase
3 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
Rachel Whenman
5.0 out of 5 stars Good Product - tiny package!
Reviewed in the United Kingdom on December 18, 2019
Size: 4-OunceStyle: FreshwaterVerified Purchase
Sending feedback...
Thank you for your feedback.
Report abuse
Hop Picker
5.0 out of 5 stars Kick starts the natural cycle.
Reviewed in the United Kingdom on August 15, 2019
Size: 4-OunceStyle: FreshwaterVerified Purchase
Sending feedback...
Thank you for your feedback.
Report abuse
Bobby785
4.0 out of 5 stars Helped to clear bacterial bloom
Reviewed in the United Kingdom on November 3, 2018
Size: 4-OunceStyle: FreshwaterVerified Purchase
One person found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
Jooles
5.0 out of 5 stars Good Product, But Hunt round for Deals on Price
Reviewed in the United Kingdom on July 6, 2018
Size: 16-OunceStyle: FreshwaterVerified Purchase
One person found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
DCol
5.0 out of 5 stars Works well
Reviewed in the United Kingdom on July 26, 2019
Size: 8-OunceStyle: FreshwaterVerified Purchase
Sending feedback...
Thank you for your feedback.
Report abuse
Vincent
1.0 out of 5 stars Disappointed
Reviewed in the United Kingdom on February 24, 2019
Size: 8-OunceStyle: FreshwaterVerified Purchase
review image
Sending feedback...
Thank you for your feedback.
Report abuse
Spencer
5.0 out of 5 stars Excellent brand
Reviewed in the United Kingdom on January 6, 2020
Size: 8-OunceStyle: FreshwaterVerified Purchase
Sending feedback...
Thank you for your feedback.
Report abuse
A. Munday
5.0 out of 5 stars Great Product
Reviewed in the United Kingdom on April 19, 2015
Size: 8-OunceStyle: FreshwaterVerified Purchase
3 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse