API Marine Complete Trace Aquarium Water Conditioner, 16-oz bottle

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About This Item


  • Promotes healthy aquarium conditions by adding or restoring over 60 trace elements found in natural sea water.
  • Added iodine supports the growth and color of coral and invertebrate molting.
  • Ideal for use in marine aquariums including reef aquariums containing coralline algae, hard and soft coral, crustaceans, live rock, saltwater fish and starfish.
  • Great for use in aquariums that utilize protein skimming.
  • One 16-ounce bottle treats over 940 gallons of aquarium water.

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Frequently Bought Together

API Marine ALGAEFIX Algae Control 16-oz bottle
Rated 3.5556 out of 5 stars
$18.98Chewy Price
Total Price: $34.37

About API Water Conditioners

It’s Smart To Be Proactive!

The best way to keep your aquarium clean is to maintain good water quality. This will help keep your fish strong and vibrant and prevent disease. Water conditioners and test kits from API can help you keep your aquarium water safe and healthy.

How Do I Maintain a Healthy Environment?

It is important to test your aquarium water weekly to ensure it stays healthy for your fish.  In addition, a bi-weekly partial water change of no more than 25% will help reduce toxic buildup, remove debris the filter missed, and replenish the oxygen available to your fish.

Feed Twice Daily and Test Water Weekly

Feed your fish twice a day, check their water temperature, and observe them to make sure they are active. You should also test water quality weekly for optimal safety. For fish to thrive, their water must closely match that of their natural environment—poor water quality can cause stress, illness and even fish loss. The 6 important parameters for healthy aquarium water are ammonia, nitrite, nitrate, pH and water hardness (GH & KH). All of these can vary over time and are invisible to the eye.

Change Water and Restore the Ecosystem

In a closed aquarium environment, there are no natural rivers or streams to carry away debris and other waste materials. That is why you should replace 25% of your aquarium water every two weeks, making sure to add water conditioner to your tap water to make it safe for your fish. You should also change your filter media and clean your gravel monthly. Adding beneficial nitrifying bacteria with API Quick Start when you do will help restore your aquarium’s fragile ecosystem and avoid disruption.

What Do API Products Do and When Do I Use Them?

API Test Kits

Use test kits weekly to monitor water quality parameters, which can vary over time and impact the health of your fish.

API Stress Zyme

Using this every week will help keep your aquarium clean and your gravel and ornaments sludge-free.

API Algaefix

Use weekly to control algae growth and keep aquarium glass, ornaments and plants clean.

API Stress Coat

Use every 2 weeks during water changes to make tap water safe, and when adding fish, or when fish are injured.

About API

The team at API has a passion for fish and understands the rewards and relaxation fishkeeping can bring. For almost 60 years, they have developed premium products with a focus on proven and effective results. API offers a range of testing kits, water conditioners and nutritionally superior fish foods. They are dedicated to making a better underwater world for the benefit of fish and those who keep them.

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Fish TypeMarine Fish, Marine Invertebrate, N/AMarine FishMarine Fish, Marine InvertebrateMarine Fish, Marine InvertebrateMarine Fish
Aquarium TypeSaltwaterSaltwaterSaltwaterSaltwaterSaltwater

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