API Marine Quick Start Aquarium Water Conditioner, 16-fl oz bottle

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About This Item

Details

  • Fast-acting formula allows you to start a new aquarium quickly and helps prevent new tank syndrome.
  • With regular use, creates a natural biological filter that helps reduce harmful ammonia and nitrate spikes caused by fish waste.
  • Helps fish stay healthy and stress free in saltwater and reef aquariums.
  • Safe for use when starting a new aquarium, changing water or filter media and adding new coral, fish and live rock.
  • One 16-ounce bottle treats over 200 gallons of aquarium water.

Instructions

FAQ

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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Questions & Answers

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4.5
Rated 4.5 out of 5 stars
13 Ratings

2 Customer Reviews



Rated 5 out of 5 stars
By George on May 12, 2025

add a bit to water at each water change

we use tap water conditioner in each gallon we prepare for change, but, we also put a touch of this in during each water change. the pet store test our water and

we use tap water conditioner in each gallon we prepare for change, but, we also put a touch of this in during each water change. the pet store test our water and says it is perfect.


Rated 1 out of 5 stars
By robert on Nov 26, 2023

zero results

followed instructions tested water ammonia levels just keep rising waste of time and money

followed instructions tested water ammonia levels just keep rising waste of time and money