API AQUARIUM START UP PACK Water Conditioner 1.25-Ounce Bottle 2-Pack
$6.99
Price: $6.99
(as of Oct 18, 2025 10:36:00 UTC – Details)
API AQUARIUM START-UP PACK comes with one 1.25 oz. bottle of API STRESS COAT, and one 1.25 oz. bottle of API QUICK START. API STRESS COAT works to make tap water safe for fish, as well as reduce overall fish stress using soothing Aloe Vera. API QUICK START starts the aquarium cycle by adding live, nitrifying bacteria to aquarium water, helping to convert poisonous compounds from fish waste and uneaten food into harmless substances. Also allows the instant addition of fish. Plain tap water contains chemicals that are harmful to fish, and API STRESS COAT will neutralize these chemicals for a healthy start-up aquarium. Dose according to directions on product packaging. For use in fresh or saltwater aquariums. 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.
Is Discontinued By Manufacturer : No
Product Dimensions : 4.88 x 1.19 x 6.38 inches; 3.2 ounces
Item model number : 84E
Department : Unisex-Adult
Date First Available : July 6, 2012
Manufacturer : Mars Fishcare
ASIN : B008I7L62S
Best Sellers Rank: #19,497 in Pet Supplies (See Top 100 in Pet Supplies) #162 in Aquarium Water Treatments
Customer Reviews: 4.7 4.7 out of 5 stars 2,150 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Contains one (1) API AQUARIUM START UP PACK Water Conditioner 1.25-Ounce Bottle 2-Pack
Makes tap water safe for fish and reduces fish stress.
Starts aquarium cycle and allows instant addition of fish.
Comes with two API products, STRESS COAT and QUICK START, for a healthy start-up aquarium.
Use when starting a new aquarium, changing water, or adding fish. Add STRESS COAT first and then QUICK START.
Customers say
Customers find the water conditioner effective, with one mentioning it worked well during fishless cycling. The product is particularly suitable for small to mid-size aquariums and offers good value for money. They appreciate its ease of use, with one customer noting their fish could be introduced instantly after adding it, and they report positive health outcomes for their fish. The size receives mixed feedback, with some finding it perfect for smaller tanks while others note the bottles are small, and while many say it lasts a long time, opinions on longevity are mixed.
13 reviews for API AQUARIUM START UP PACK Water Conditioner 1.25-Ounce Bottle 2-Pack
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$6.99
Karen –
Good quality
Exactly what you need to start up a fish tank
mason55 –
Clear & Safe Water
Works as expected. Just the size needed for kids 1.5 gallon tank
Amanda –
Itâs great but it doesnât last that long
Pros: It didnât harm my fish, it kept my water looking pretty nice it was fast to put in 1 bottle had bacteria and the other had water conditioner so itâs two and one, great bang for your buck The only conI see is that it doesnât last that long since the bottles are small.
Taylor H. –
Worked Well With Fishless Cycling & Setting Up New Tank in Place of Cracked One. Highly Recommend!
I bought this product to speed up the cycling process in a new betta fish tank, and to dechlorinate my water so it would be safe for my newly added fish. Within a couple of days of adding the Quick Start to speed up my fishless cycling, I saw the spikes in ammonia, nitrates, and lastly the growth of the nitrates. For me, this product worked effortlessly, and after having the fish for a month now, I plan to buy more stress coat in the future. A week ago, my fish tank cracked and leaked out a good amount of water, but after adding stress coat to the backup tank (a really large Tupperware bin), my fish was calm, did not freak out, and lived through quite a stressful experience. After saving what water I could from his tank, and saving the filter media, I added new water with more stress coat, and he’s now better than ever, and even more lively than before.Also, if you are starting a new tank, this product would be perfect for you because of the small size. The amount of chemical is about the size of a film canister, and since you only use quick start once, I did not feel guilty about the price/amount of chemical I would not be using.I highly recommend this product for both the price and the size for setting up a new tank.
Bri –
Small
Nice thought it was bigger
Ricki –
Great for our fish!!!
Great product! Cleans our fish tank really well. Our fish stays healthy and the water clarity is great!!
Amazon Customer –
Must needed for water changes.
A must have when adding new fish or doing water changes. This is my 2nd purchase of these light startup bottles, but I think I’m going to have to purchase the larger bottles since I’ve added two additional tanks. I religiously use both when I do water changes to remove any chlorine. I currently have 2 20 gallon long tanks- one for 2 aquatic turtles and the other used for breeding guppies and growing aquatic plants both as food for the turtles. I also have a 5-gallon glo fish tank. All inhabitants seem healthy and happy and I know I owe part of that to these water conditioners. The item is fairly inexpensive and I feel better knowing I am removing unwanted, harmful chemicals for the animals. Highly recommended!!!!!
Amazon Customer Debra from Tx. –
Nice combo for my tank
Great product for you aquarium. Good value, this is a must have for starting up your new aquarium or use during tank cleaning. No stress to my fish.
5umit –
I ordered this item going by the image shown on the product page thinking it will be the similar product from the company. But the bottles were very different and were packed in loose cling wrap.Therefore Iâm not 100% sure about the authenticity of product.
Ibrahim –
Itâs very good quality
Peppino –
Prodotto usato solo al primo avvio del filtro ed alla successiva introduzione dei pesci.
Rahzey –
Helps a lot when transferring new fishes on my aquarium.
megumi –
Please donât buy from here. The product was opened and used!! There was nothing in one of the bottles too. I wouldnât even dare to use the unknown liquid in my fish tank!! Also, one of them smells like mouth wash.