Mon-Thurs 7am-5pm PST
Fri 7am-4pm PST

Questions about products, orders, shipping?
Contact us by call or email

API Freshwater/Saltwater High Range pH Test Kit, Test kit of 250 tests


Item #: AP3113

In Stock

Use to measure pH changes in marine aquariums, aquariums with African cichlids, and very alkaline tap water. Reads the pH of water within the high range of 7.4 to 8.8. 250 tests per kit.

Freshwater/Saltwater High Range pH Test Instructions:

Why Test pH?
pH is the measure of acidity of water. A pH reading of 7.0 is neutral. A pH higher than 7.0 is alkaline, and a pH lower than 7.0 is acidic. Certain freshwater fish thrive at a pH above 7.0. Live-bearers and goldfish require a pH of 7.5. African cichlids, marine fish and invertebrates require a pH between 8.2 and 8.4. Maintaining the aquarium at the proper pH ensures optimal water quality.

Testing Tips:
This test kit measures pH from 7.2 to 8.8 in either fresh or saltwater aquariums. This kit contains two High Range pH Test Color Charts — one for freshwater aquariums, and one for saltwater aquariums — so be sure to use the correct chart for your type of aquarium when interpreting test results. The Freshwater pH Test Color Chart is the appropriate chart to use for testing freshwater aquariums to which aquarium salt and African cichlid salt have been added. Artificial salt water should have a pH of 8.2. If not, adjustment with Aquarium Pharmaceuticals PROPER pH™ 8.2 is recommended. pH adjustment may be required in newly made salt water.

Directions for Testing pH:
  • Read thoroughly before testing. Do not allow Test Solutions to get into aquarium.
  • To remove childproof safety cap: With one hand, push red tab left with thumb while unscrewing cap with free hand.
    • Fill a clean test tube with 5 ml of water to be tested (to the line on the tube).
    • Add five drops of Indicator Solution, holding dropper bottle upside down in a completely vertical position to assure uniformity of drops.
    • Cap the test tube and invert tube several times to mix solution. Do not hold finger over open end of tube, as this may affect the test results.
    • Determine the pH reading by matching the color of the solution against those on the High Range pH Color Chart. The tube should be viewed against the white area beside the color chart. Color comparisons are best made in a well-lit area. The closest match indicates the pH of the water sample. Rinse the test tube with clean water after each use.
Recommended pH Levels:


A pH level of 8.2 is ideal for saltwater fish, invertebrates and African cichlids. To automatically set the pH at 8.2. use Aquarium Pharmaceuticals PROPER pH 8.2 for saltwater aquariums. Proper pH 8.2 is a carbonate buffer which automatically adjusts and holds the pH at 8.2.

A pH of 7.5 is ideal for most live-bearing fish, such as mollies and swordtails. Goldfish will also thrive at a pH of 7.5. To raise or lower the pH of a freshwater aquarium, use Aquarium Pharmaceuticals pH UP™ or pH Down™, following the directions on the container. Proper pH 7.5 may be used to automatically adjust and hold pH at 7.5. Proper pH 8.2 may be used in African cichlid aquariums.

Frequency of Testing:
The pH should be tested weekly, since natural materials in the aquarium (such as fish waste and decaying food) can cause pH changes. The minimum pH reading for this kit is 7.2 and the maximum is 8.8. Under extreme water conditions, readings below the minimum will read 7.2 and above the maximum will read 8.8. pH adjustments outside the range of this kit will not show any changes until the pH of the aquarium water is within the range of this kit.

  • Keep out of reach of children.
  • Eye contact: gently flush with water for at least 15 minutes. Remove contact lens, if present, after the first 5 minutes, then continue rinsing.
  • Skin contact: wash thoroughly with soap and water.
  • If swallowed, contact a physician or Poison Control Center immediately.

Manufacturer information

Aquarium Pharmaceuticals Aquarium Supplies
Aquarium Pharmaceuticals (API) has been helping people take good care of ornamental fish for over 40 years. Their research and development scientists have advanced the care of fish with all-natural medications, stable bacteria for biological filtration, one-bottle test kits, consumer-friendly dosing caps and much more. They’ve received over 25 global patents for their breakthrough innovations in the aquatics industry. And they continue to look for ways to improve the fishkeeping experience for hobbyists. Research. Experience. Dedication to scientific, quality treatment for healthy fish. It’s what makes API the first choice of aquarium owners. API manufactures and sells hundreds of products across many different product categories, including aquarium and pond treatments, aquarium equipment, aquariums and fish nutrition.

4 Stars


Reviewed on
August 08, 2020

Yes, I would recommend this.

Cheap, quick and easy

Pros: Affordable, easy to perform

Cons: result can be hard to read

Reef keeping is already expensive, so I appreciate the affordable API test kits. Nevertheless, this kit is great tp determine the if your water's pH is within RANGE as it can be hard to match the color on the reading chart. I would not rely on this kit if your tank requires specific pH reading.

Was this review helpful? 0 0


Reviewed on
March 25, 2019

Yes, I would recommend this.

Easy to read, quick

Easy to read and quick to perform

Was this review helpful? 0 0


Reviewed on
January 18, 2018

Yes, I would recommend this.

It works!

Pros: price, easy to use,

Cons: kinda hard to match results to the color card

This test kit is by no means the best but works. Haven't had any issues as far as accuracy for my reef tank.

Was this review helpful? 0 0


Reviewed on
May 24, 2017

Yes, I would recommend this.

PH Test Kit

This test kit is great and exactly what I needed for my saltwater tank. You can't beat the price or the quick shipping.

Was this review helpful? 0 0

phyllis mercer

Reviewed on
December 25, 2014

Yes, I would recommend this.

the best

the product was excellent

Was this review helpful? 0 0

guy vitale

Reviewed on
April 16, 2013

Yes, I would recommend this.

Great Product

I haven't been using the test kits long, but so far they seem to work. Very good value for the price.

Was this review helpful? 0 0

scott middaugh

Reviewed on
July 16, 2012

Yes, I would recommend this.


I have used this kit for a few years. The color coded cards very just a little bit with some boxes but there close enough for me.

Was this review helpful? 0 0


Reviewed on
June 28, 2012

Yes, I would recommend this.

Does the Job

I've used the API High Range pH test kits for my reef aquarium for the last 3 years and they've been consistently reliable. Testing pH is fairly easy to do accurately so its a hard test to mess up. The color comparison card included is easy to read and the directions straight forward. I use Salifert test for my other water parameters because they are generally more reliable but for testing pH this test does the job and is cheaper.

Was this review helpful? 0 0

william heinrich

Reviewed on
December 11, 2011

Yes, I would recommend this.

Does the job

Does what it is supposed to do.

Was this review helpful? 0 0

william miller

Reviewed on
September 13, 2011

Yes, I would recommend this.

Great test kit

Simply test kit to use fast results. For the price and excellent test kit

Was this review helpful? 0 0

We use cookies to provide a personalized site experience. By continuing to use & browse this site, you agree to our Privacy Policy.