API Proper pH 7.5 Aquarium Water Treatment, 9.2-oz bottle - Chewy.com

API Proper pH 7.5 Aquarium Water Treatment, 9.2-oz bottle

Rated 4.5714 out of 5 stars
$13.18Chewy Price
$15.48Chewy Price
$12.52Autoship Price
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About This Item


  • Formulated to help set and stabilize pH at 7.5 for fish who thrive off of this level like goldfish, mollies, guppies and barbs.
  • Helps to remove chlorine and detoxify heavy metals, for a more habitable environment for your finned friends.
  • Easy to use, fast dissolving and is ideal to use during setup and water changes.
  • Specifically designed to help modify and maintain pH levels in freshwater aquariums.
  • Contains aloe vera to help heal and regenerate damaged tissue, plus electrolytes to help prevent electrolyte imbalance.

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Play Video: Learn More About API From Our Team of Experts
Learn More About API From Our Team of Experts

Test your aquarium's pH level with API's pH Test Kit, pH Test and Adjuster Kit or pH Test Strips.

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

5 Customer Questions

Is this a bicarbonate buffer? Or phosphate?
Answer by ChewyOct 22, 2017
This product is a phosphate buffer.

do I have to remove my fish to use this, and is it safe for plants
Answer by ChewyMar 28, 2022
The fish do not need to be removed from the aquarium during treatment. The API Brand of products are meant to be added to aquariums that include their inhabitants. Simply be sure to follow the directions on the packaging as far a dosage amounts and frequency of dosing, so that your wet pets remain safe. The powders in API Proper pH 7.5 bind to some trace elements which are needed as nutrients by live plants. Therefore, we do not recommend using these API Proper pH powders with live aquarium plants.

How much of this stuff do you have to add to a 75g aquarium to get it to work?
Answer by ChewyJan 01, 2020
Add 1 scoop for every 10 gallons of aquarium water. Repeat dose when pH test indicates a pH change of more than 0.2. Normally, one dose will set the pH. Some tap water sources used in freshwater aquariums are strongly buffered at pH 8.0 and above. In this case, two doses of API PROPER PH may be required to overcome the buffer system and reset the pH to a desirable level.

can I use this for my Betta fish
Answer by ChewyMar 28, 2022
This would not be recommended for a betta fish. Bettas prefer calm water with a pH between 6.8 and 7.5. The ideal pH level for betta fish is 7.0.

ReviewsWrite a Review

Rated 4.5714 out of 5 stars
7 Ratings
Would recommend to a friend

7 Customer Reviews

Rated 3 out of 5 stars
By Jonathan on Jun 21, 2022

NOT for use in aquariums containing live plants!

I did not see anywhere when I bought this that it should not be used in aquariums with live plants. Even checking it now all I see is a FAQ answer which was posted after I bought this. I did not use this product so it might be 5 star but the product page, or video even, needs to call out this limitation. Maybe someone will read this and save a few bucks buying something they can't use.

Rated 5 out of 5 stars
By Emma on Nov 11, 2021

Old Reliable

I've been using Proper pH 7.0 and 7.5 for 20 years (more or less.) The water where I live has always been very basic (8 to 8.5) and not ideal for my community or goldfish tanks. I've tried adding acids - it never lasts. I've used catappa leaves and driftwood with different degrees of success. However... the browned water doesn't look good in all of my tanks, and the effect can take a while to set in. This stuff, though, always works. Though it warns that hard water might become cloudy, I've never really experienced that problem. Proper pH lasts in the tank so that you only need to add it when the pH starts to climb again. On top of that - I've used way "over expired" product (don't judge, I ran out, had old stuff stashed in a box, and it was kinda an emergency,) and it still worked INSTANTLY. I don't use this in planted/natural tanks. That's better done with driftwood, alder cones, and catappa leaves. But if you're trying to get your artifical environments balanced, this is the thing to use.

Rated 5 out of 5 stars
By Zackster86 on Aug 9, 2021

Great Product!

I have a tank with oscars, blood parrots, a synodontis catfish and a Redfin shark who are picky when it comes to the PH of their home and are prone to not feel good with the slightest change. This helps so much…it gets my water babies feeling back to normal fast!

Rated 5 out of 5 stars
By Lizz on Oct 22, 2021

Good product

Keeps the levels in the fish tank good. Love API products, its all I use.

Rated 5 out of 5 stars
By Kadenexpe1 on Sep 14, 2020

I love it and Highly Recommend

I’ve seen a difference in my black mollies and it really increase my ph levels from a 6.0 to a 7.5. My fish love Chewy .

Rated 5 out of 5 stars
By Tamm on Jan 27, 2019

Great product

I love this product. It does the job&i can see a difference in my fish. They to love cheey.com

Rated 4 out of 5 stars
By mrnat2 on Sep 13, 2018

Good Product!

This is the only Treatment we have found that has worked. We have had problems with the PH since we moved here, we have tried a number of products none have worked. We are happy with the results, the goldfish like it also. thank you!