API TAP WATER CONDITIONER Aquarium Water Conditioner 16-Ounce Bottle

10 reviews
Brand API
Liquid Volume 16 Fluid Ounces
Item Weight 1.2 Pounds
Target Species Fish
Allergen Information Gluten Free
  • Contains one (1) API TAP WATER CONDITIONER Aquarium Water Conditioner 16-Ounce Bottle
  • Neutralizes chlorine, chloramines and other chemicals to make tap water safe for fish
  • Prevents tap water chemicals from causing gill destruction, tissue irritation and fish death
  • Super strength, high concentration formula
  • Use when adding or changing water and when adding new fish to freshwater and saltwater aquariums
  • Add 1 ml. for each 20 gallons of aquarium water.


Product Description

Good water quality is the key to a healthy, beautiful aquarium. Tap water contains chemicals, such as chlorine and chloramines, which make water safe for drinking, are highly toxic to fish. High levels of these chemicals destroy fish gill tissue, preventing the uptake of oxygen which can lead to fish death. Even low levels irritate delicate fish tissue. Tap water must be treated before adding fish to make sure fish remain healthy. API TAP WATER CONDITIONER Aquarium Water Conditioner instantly removes chlorine and neutralizes chloramines. It also detoxifies heavy metals in tap water. The formula of API TAP WATER CONDITIONER incredibly concentrated. You only need up to 3 ml to treat 10 gallons of water. It’s safe for all aquatic and can be used in both fresh and salt water. Use during aquarium set up, water changes and adding fish. With API aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too.

From the manufacturer

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It’s Smart To Be Proactive!

The best way to keep your aquarium clean is to maintain good water quality. This will keep your fish strong and vibrant, as well as preventing disease.

How Do I Maintain A Healthy Environment?

It is important to test your aquarium water weekly to verify good quality in addition to a bi-weekly partial water change of no more than 25% to help reduce toxic buildup, remove debris the filter missed, and replenish the oxygen available to fish.

How Do I Take Good Care Of My Aquarium & Fish?

  • Feed & observe fish daily
  • Test water quality weekly
  • Change 25% water every 2 weeks
  • Restore your ecosystem monthly

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.

Test Water Quality Weekly

An aquarium is a closed environment and in order for fish to thrive, water must be similar to that which could be found in their natural environment. Poor water quality can cause fish stress, illness and even loss. The 6 common water quality parameters are Ammonia, Nitrite, Nitrate, pH, and water hardness (GH and KH) – all of which may vary over time and all are invisible to the eye which is why it is important to test weekly with API MASTER TEST KITS or API 5-IN-1 TEST STRIPS. It is also a good time to add API STRESS ZYME to keep your aquarium & gravel clean.

Change 25% Water Every 2 Weeks

In a closed aquarium environment there are no natural rivers or streams to carry away debris and other waste materials. It is important to renew 25% of the aquarium water every two weeks. When you change the water, it is important to know that tap water contains chemicals that make it safe for us to drink but harmful for fish, therefore add a water conditioner such as API STRESS COAT.

Restore Your Ecosystem Monthly

It is important to change your filter media & clean gravel monthly, however in doing so it can disrupt the fragile ecosystem of your aquarium. Use API QUICK START to strengthen it with ‘beneficial’ nitrifying bacteria that will naturally consume toxic compounds and help prevent fish stress. Also recommended when starting a new aquarium or changing the water.

boy feeding fish

Making A Better Underwater World

At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world.

Important information


Instantly Detoxifies Heavy Metals, Removes Chlorine, And Breaks Chloramine Bonds.


As Labeled
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10 reviews for API TAP WATER CONDITIONER Aquarium Water Conditioner 16-Ounce Bottle

  1. T

    Great Price, it works great.

  2. Mia

    This product is my go to for neutralizing tap water – for plants or aquatic life. Always consistent, safe and simple to use – follow recommendations!

  3. Alanah

    Great price for the quality!

  4. Bobby Magic

    I used to have high quality well water. Back then, I was an African Cichlid guy. My well water was the closest thing to Lake Malawi or Lake Tanganyika that one could ask for. High pH and SUPER hard! Then my neighborhood voted for “City Water”. That was about 10 yrs ago and I got out of the Cichlid hobby at that time. Now I’m getting back in with Aquascaped Nano tanks. My “City Water” is highly Chlorinated. I NEED this product. The API Tap Water Conditioner really does neutralize or dechlorinates the chlorides. Heavy metals too (as advertised) but I cannot really testify to that. But neutralizing Chlorides. It’s fantastic. I’m going to buy a gallon jug of this stuff. The little bottle doesn’t hack it if you do a lot of water changes or even just cleaning your filters. You can’t just use tap water. You’ll kill the beneficial bacteria. All tap water must be treated no matter what you are using it for if it’s related to your tank or gear…you need API® TAP WATER CONDITONER . You NEED it!

  5. QuiltingGram

    Bought this for watering my plants without harmful tap water chemicals. I don’t see a difference after using for several months, so I guess it’s working! At suggested amounts of use it should last a long time.

  6. Jummi

    Works just fine. No complain.

  7. gtippitt

    I love all of the API products, especially their easy to use test kits. This product is great as well. Regardless of which size you buy of their tap water conditioner, it is the best value of reputable brands that will treat all tap water for your pond or tank. It only requires 3 drops per gallon you add to your tank. It removes chlorine, neutralizes chloramines, and helps detoxify any heavy metals in your tap water. Some more expensive products will claim to also include things to help your fish maintain their protective slime coating (and cure male pattern baldness and perhaps ED). If your fish are healthy, and your tank’s water parameters are maintained well through weekly water changes and good filtration, those other ingredients are useless. (The “Special Sauce” is just ketchup, mayonnaise, and relish.) If your fish have sores or other health problems, then find the cause, fix it, and treat them with something besides a tap water conditioner if needed.Like every other tap water treatment API’s instructions first tell you an amount of the product required to remove chlorine, and then in smaller print below say to use 2 to 3 times as much to also neutralize the more toxic chloramines that may be added during the purification of your water. I don’t know why the companies that make these products won’t be honest and say up front to use the higher amount, and then in small print say you can skimp and use less if you want to save money and risk the health of your fish.If you have confirmed with your local water authority that they do not use chloramines during their treatment or your water, then it only requires a single drop per gallon to remove chlorine. I did not bother to call my county water authority, since I had no way to confirm that the person who answered the phone would know chlorine, chloramine, nor chloroform for that matter. from their own colon or a hole in the ground. Even if you personally spoke to someone that could tell you for dead certain that chloramines are not being used, they are not going to text you if that changes in the future. Unless you are the person in charge of that step of water treatment for your area, the only way to know for certain if your water was safe for your fish with only a single drop per gallon, is if you use one drop, then test that water for any detectable ammonia that is the treated water. The chloramines contain a small amount of ammonia. Then you would know it was safe to add to your tank without causing them irritation and inflammation of their gill tissue. It is much safer to simply to add 3 drops per gallon. More doesn’t hurt anything, but it’s just wasted.To refill my tanks, I keep a pair of 5 gallon plastic bottles that were used for filtered / spring water. After I fill my tanks, I add the tap water treatment to the jug, refill it, and let it sit until I need it. This allows the conditioner time for its anti-heavy metal ingredients to work fully. It also lets the water come to room temperature, since 5 gallons of icy cold tap water in winter can cause the temp to drop in a 55 gallon tank. Perhaps more importantly, the water lines in many places are old and require frequent repairs or expansion. When repairs are made to water mains, they sometimes add extra chlorine disinfectant at the repair site to insure that any bacteria that might have gotten introduced to the main are killed and cannot grow and contaminate our drinking water. While I cannot normally detect a smell of chlorine in my tap water, I occasionally notice that it smells a bit more like a swimming pool than tap water. If more chlorine than normal is in the tap water, then more neutralizer would be needed. Most Chlorine will gas off on its own if the tap water is left uncovered for 24 hours, but Chloramine will not. When they disinfect a repair site, they are normally only using chlorine. By leaving the water I will add to my tank sitting for at least a day, then I am positive that it is always safe to add to my tank.I have had people ask me before if they can add the conditioner to the tank and then use a water hose to refill their tank. I don’t normally recommend this because many of our fish are conditioned to come to the part of the tank where we are standing and adding water, because they think food will soon be added as well. If you add the conditioner to the tanks water rather than to the tap water first, then the tap water from a hose will take a short while to react with the treatment additive. Temporary short spikes of chlorine won’t kill your fish, but cumulatively over time, it’s not good for them either. Also unless you have a hose that is certified safe for drinking from, it can leach harmful chemicals into the water you’re adding to the tank. If you are using a normal garden hose to refill your tank after water changes, at the minimum you should run water through it first for a few minutes to make sure that any that has been standing in the hose is washed out.

  8. Ursula Marrolli

    I saw a recommendation from a plant expert about this product and decided to give it a try. I definitely, after quite a few weeks use, see an improvement in all my plants…but especially the ones that tend toward brown leaf tips. My rattlesnake plant (calathea) that was really going downhill and my prayer plant (maranta) both look so much better. Since that is not what it is meant for I had to rely on other advice for measurements, but all is good at the moment. It is economical, so that is another helpful factor since I do have over 100 plants. Distilled water is cost prohibitive and did not produce much, if any, results. Within 3 weeks of using the Api conditioner in my tap water I saw undeniable improvement. So…it works for me.

  9. paul

    Good product good price.

  10. Amazon Customer

    Value for Money
    I have used this for many years. I find the product works well and is excellent value compared to many.

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