

💧 Keep your fish thriving with every drop—because your aquarium deserves the best!
API TAP WATER CONDITIONER is a premium 16-ounce aquarium water treatment that instantly neutralizes chlorine, chloramines, and heavy metals in tap water. Its super concentrated formula requires only 1 ml per 20 gallons, making it highly efficient and cost-effective. Safe for all freshwater and saltwater fish, it prevents gill damage and tissue irritation, ensuring a healthy aquatic environment. Trusted for nearly six decades, API delivers reliable, fast-acting water conditioning for both new setups and routine maintenance.













| ASIN | B004LO9KSY |
| ASIN | B004LO9KSY |
| Best Sellers Rank | #684 in Pet Supplies ( See Top 100 in Pet Supplies ) #2 in Aquarium Water Treatments |
| Brand Name | API |
| Color | White |
| Country of Origin | United States |
| Customer Reviews | 4.7 4.7 out of 5 stars (24,220) |
| Date First Available | June 20, 2004 |
| Date First Available | June 20, 2004 |
| Department | Unisex-Adult |
| Department | Unisex-Adult |
| Directions | Use when setting up an aquarium, and when adding or changing water. Using dosing cap on bottle, add 1 ml for each 20 gallons (76 L) of aquarium water to remove chlorine and heavy metals. To detoxify chloramines, add 5 ml for each 30 gallons (114 L) of aquarium water. Tip: heavy metals, such as copper, lead, and zinc, can be found in most tap water supplies. These metals are toxic to tropical fish. |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 2.5 x 2.5 x 8.75 inches |
| Item Package Dimensions L x W x H | 8.86 x 5.59 x 2.68 inches |
| Item Weight | 1.2 Pounds |
| Item model number | 52C |
| Item model number | 52C |
| Manufacturer | Mars Fishcare |
| Manufacturer | Mars Fishcare |
| Manufacturer recommended age | 1 month and up |
| Material | Plastic |
| Model Name | TAP WATER COND. 16 OZ. |
| Number of Items | 1 |
| Product Dimensions | 2.5 x 2.5 x 8.75 inches; 1.2 Pounds |
| Size | 16 oz |
| Style | Aquarium Treatment |
| Target Audience Keyword | fish |
T**O
A Must-Have for Aquatic Health!
I’ve been using API TAP WATER CONDITIONER for a few weeks now, and I’m extremely impressed with its effectiveness in keeping my aquarium water clean and safe for my fish. Here’s why I’m giving it a 5-star review: 1. Perfect for New Aquariums and Water Changes: I’ve recently set up a new tank, and this conditioner has been a lifesaver. It quickly removes harmful chlorine, chloramine, and heavy metals from tap water, which could be toxic to fish. It ensures the water is safe to use without waiting for the water to sit for days. 2. Safe and Effective for All Fish Species: Whether I’m adding new fish to my tank or doing a routine water change, I feel confident using this product. It’s safe for all types of freshwater fish, including my delicate species. I haven’t noticed any signs of stress in my fish after water changes, which speaks volumes about the quality of this conditioner. 3. Easy to Use: The API TAP WATER CONDITIONER is super easy to use. I simply add the recommended amount per gallon of water, and it instantly works its magic. No hassle, no mess—just pour and go! 4. Great Value for Money: Considering the price and the amount of product you get (16 ounces), this conditioner is a great value. It lasts for a long time since you only need a small amount with each water change, making it an affordable option for any aquarium owner. 5. Fast Acting: The conditioner works fast! I can fill the tank with treated water and immediately begin acclimating new fish. I’ve had no issues with cloudy or unsafe water when using this conditioner, and it’s consistently kept the water quality at its best. 6. Trusted Brand: API is a well-respected brand in the aquarium industry, and it’s a name I trust when it comes to my fish’s health. Their products are always reliable and effective. Final Thoughts: If you’re an aquarium owner, whether you’re new to fishkeeping or a seasoned pro, I highly recommend the API TAP WATER CONDITIONER. It’s safe, affordable, and does exactly what it promises—ensures clean, safe water for your fish and keeps them happy and healthy. 💯 Five stars – a must-have for any aquarium enthusiast!
M**E
Healthier water for healthier plants
Looking forward to healthier and happier plants. Going by all the reviews, this product seems to stand the test of time. I haven’t used it yet, but I’m certain it is much more effective, and of way higher quality, than tap water. No smell. And the cap has a 1 mL measurement which is really nice for me, since I use gallon, or less, containers, for watering. Great expiration date for lasting a long time.
M**W
Affordable, and Effective Water Conditioner
I’ve been using API Tap Water Conditioner for years, and it has consistently delivered great results. For me, it’s the perfect balance of effectiveness and price, it works just as well as higher-end brands, but at a fraction of the cost. A 16oz bottle lasts me around 5 months while maintaining two aquariums (a 20-gallon and a 40-gallon), which makes it an incredible value. The built-in measuring cap is a simple but very handy feature, it takes all the guesswork out of dosing. My routine is to add half the recommended dose while refilling the tank and the other half once it’s completely filled. In all the time I’ve used this conditioner, I’ve never had a single issue with water quality or fish health related to tap water treatment. It’s easy, dependable, and budget-friendly, exactly what I want in a staple aquarium product. Highly recommended for any fishkeeper.
M**E
Excellent value. Have been using for years. Would never buy anthing but this.
I swear by this stuff. It's perfect for water changes. I use it in all my aquariums and in my pond. I never mix water first. I just do it in the tank. I do add water slowly though. It has no smell or color. It works very fast. It is highly effective. I add one cap full for every 30 gallons of water in my tank and it always works. It says add such and such for every gallon that you add, but I do the math by the water volume of my tank since I am adding tap water directly to my tank. A couple of drops is all you need for a gallon if you are only topping it off. I do about 70% water changes biweekly using this stuff. If you are having dead fish most likely the issue is because of temp, adding it too fast, or you just need to add more. I have even added way more than it needed by accident. It had literally no effect on my fish or plants at all. Very hard to overdose your tank unless you dump in the whole bottle. I do wear gloves when using this product. Can't be too careful. And eye protection too.
J**P
Awesome Product-Funky Smell
I bought this water conditoner for my betta tank. It does a great job and conditioning the water, and the measuring cap comes in handy. This stuff doesn't detoxify ammonia and nitrite like Seachem Prime does, but still gets the job done for my betta. It is a huge bottle that can last forever as well! The only thing is the smell is kinda funky, like boiled eggs. However, this is a great budget conditioner!
S**A
Genial. Lo uso para cambios de agua de mis dos acuario y va genial.
M**A
ممتاز
R**H
Use this for my 5k gal. Kio pond. Does the job nice and gets rid of algae
R**Y
Exactly as described. Does what it says.
A**N
I like this one because it’s just one drop/gallon. Makes it easy to add to fish tank. Most of the other brands have you pore it into the cap and are so many ml/gal which sometimes makes it hard when you only need it for smaller tanks. Sometimes I just add a few gallons and I put just 3 drops in. Easy and never had a problem and I’ve been using this stuff for years. Sometimes it’s hard to find as it’s out of stock. I used to be able to buy it in store but Amazon has been the only place I could buy it for many year for some strange reason.
Trustpilot
1 week ago
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