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API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria 16-Ounce Bottle

Original price was: $24.38.Current price is: $17.38.

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Price: $24.38 - $17.38
(as of Mar 25, 2025 18:22:50 UTC – Details)


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 in API quick start are scientifically proven to quickly consume ammonia and nitrite to help prevent new tank syndrome. Allows immediate addition of fish to a new freshwater or saltwater aquarium. Use when starting a new aquarium, adding new fish, changing water, changing filter media, after medicating, or whenever ammonia or nitrite are detected. Allows instant addition of fish. Helps prevent fish loss. Immediately starts aquarium cycle. Contains live, nitrifying . No refrigeration required. All natural.
Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 2.5 x 2.5 x 8.75 inches; 1 Pounds
Manufacturer recommended age ‏ : ‎ 1 month and up
Item model number ‏ : ‎ 89E
Department ‏ : ‎ Unisex-Adult
Date First Available ‏ : ‎ January 13, 2012
Manufacturer ‏ : ‎ Mars Fishcare
ASIN ‏ : ‎ B006YG12F6
Country of Origin ‏ : ‎ USA

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

Customers say

Customers find the aquarium pond water treatment effective and providing good value for the cost. It helps keep fish healthy and happy, making an uncycled tank livable until it can cycle fully. They find it easy to use and appreciate its speedy start-up. However, some customers have mixed opinions on its effectiveness and ammonia level.

AI-generated from the text of customer reviews

11 reviews for API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria 16-Ounce Bottle

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  1. bianca emmons ;)

    this cycled my tank so quick
    this definitely helped cycle my tank super quickly i really recommend this as someone who struggled with cycling tanks a lot. i gave up so many times and sold everything and then rebought stuff again like a year later and i had gotten this and it cycled my tank in literally like a week- that’s crazy to me the ammonia levels were on point i used dr tim’s droplets the water ph levels and everything else was very good! it kept the water super clean too (idk if that was this particularly or not) but it’s an amazing product and it’s really not that expensive! it’s super easy to use as long as you follow the directions and it’s very accurate at being a quick start!

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  2. Mark Krummen

    API as always great stuff!
    I use them when starting up a new tank or even after a significant water change if I’m running late (me and my wife work 52 hours a week/14 hour days). Works fantastic just like all their products. This is a must have you just can’t wait for a tank to cycle or your worried about un-balanced aquariums after huge water changes. Put it in and everything goes exactly as if should. Everyone should have some of this in their fish cabinet/container 100%!!!

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  3. John Schnoor

    Essential for a Healthy Aquarium
    The API QUICK START is an absolute game-changer for setting up and maintaining a healthy aquarium, both freshwater and saltwater. It works quickly to establish beneficial bacteria and helps to eliminate harmful toxins.I’ve used it for both my freshwater and saltwater tanks, and it’s been a huge help in keeping the water clean and the fish happy. Highly recommend this product to any aquarium owner looking for an easy, effective way to get their tank started right.

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  4. StewartB

    Works well in my pond and aquariums. Crystal clear water! Healthy fish!
    I have had very good results using API Quick Start.It’s pretty much a staple at my house.In fact I just used some today on my new 75 gallon aquarium.It keeps my aquariums and pond healthy. Makes the bio filters efficient.I use it on new tanks and periodically to give the bio filters a boost.The water quality of my aquariums is much better using Quick Start, both on start up and on maintenance.I added some pics to show you how great everything is doing.You cannot argue with results like this.

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  5. TX

    Good for what it does (jumpstarting aquarium cycle), but has to be used properly.
    Have used Quick Start on two tanks now, one 10 gallon and one 45 gallon. The product works, BUT it has to be used in the right way (which isn’t the one printed on the back label.)The first time I used it on the 10 gallon was my first time setting up an aquarium, and I pretty much just dumped the recommended dosage in along with conditioner/stress zyme, then put in fish the next day. After about a week or two my ammonia levels spiked hard, then another one to two weeks or so after that my nitrites and nitrates started to spike. Ended up losing 50% of my fish before the cycle finally stabilized (the remainder have survived over a year now).The problem is that the cycle needs ammonia to start, and a brand new tank will not have any, nor does Quick Start contain ammonia. Therefore, if you just dump it into a new tank, then put in fish, the cycle will not start until the fish food/waste starts to decompose into ammonia, which can take a week or more. Once sufficient ammonia is present in the tank (3-5ppm), it takes about another week or two for the bacteria to then break it down to nitrites and then nitrates, completing the cycle. During this time your fish will be suffering high ammonia and nitrite levels, even with frequent water changes.To properly cycle your tank with Quick Start, you need to introduce ammonia into the water quickly and without fish. The “natural” and slower way to do this is to put biomass into the tank and wait for it to rot. This can be store bought fish (not live), shrimp, fish pellets/flakes, etc. However, these take time to decay. The faster way to introduce ammonia is to directly buy a bottle of liquid ammonia designed for cycling aquariums, and put in enough to reach 4-5ppm. Then immediately add API Quick Start, along with any conditioner/etc. After about a week or so you’ll notice the ammonia levels go down, and nitrites start spiking. After another few days the nitrites and ammonia will both go down close to or at 0, and nitrates will be present. Now the tank is fully cycled, and it’s safe to add fish.

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  6. Alexander joseph

    Aquarium quick start
    Great product

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  7. stella pye

    Saves lots of time while keeping fish safe

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  8. Bkknife

    Its good to rapidly reduce ammonia

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  9. Amazon Kunde

    API quick start ist super, ich benutze es seit etwa einem halben Jahr und bin sehr zufrieden. Ich empfehle es mit gutem Gewissen weiter!

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  10. christophe montens

    Beste tot nu toe dat ik al gehad heb

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  11. Kiran deshmukh

    Good quality productResults are identicalGood quick result

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    API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria 16-Ounce Bottle
    API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria 16-Ounce Bottle

    Original price was: $24.38.Current price is: $17.38.

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