What would I use to test if 3% H2O2 is still potent?

3% is 30,000 ppm, so NOT these 0-100 ppm test strips! You need Very High Level 2-10% test strips, which are available on Amazon.

While this product be able to measure a 7% solution of hydrogen peroxide?

This product will not be able to measure that high of a level of hydrogen Peroxide. What you should get instead is the Bartovation Food Grade Time Sensitive Very High Level Hydrogen Peroxide (h2o2) Test Strips, up to 10% Concentration (ASIN: B01CDX4ZB6). Those strips will help you know if your solution is approximately 7% because it will give you a reading in between 5% and 10%. Please let us know if you have any more questions or if there is anything else I can help you with! Best, Scott

How do i test 35% food grade hydrogen peroxide with your test strips. what ppm would i read on the container. what would i read if i reduced the 35%?

This product is designed to test residual (low level) peroxide, so, although it could be used to test food grade hydrogen peroxide, it would require a very precise dilution ratio that would be hard to achieve accurately. For testing food grade peroxide, I recommend using our "very high level" strip (https://www.amazon.com/dp/B01CDX4ZB6), where you would: mix 1 part 35% peroxide solution with 2.5 parts water to yield a concentration of 10%. If the color change is not immediate, then the initial concentration was not 35% (or a mistake was made in the dilution). Try other dilutions to zero in on the actual strength, e.g. 1:6 should give you 5%; etc.

I bought these for my pool, after putting 5 gallon of 35% h2o2 in a 25000 gallon pool water, the strip turns black, what does that mean?

As far as I recall the amount needed is 1 cup peroxide for every 250 gallons. Black is probably way higher than shades of blue that can register on strip; probably over 100 ppm.

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Bartovation Hydrogen Peroxide H2O2 Test Strips, Low Level, 0-100 Ppm [Vial Of 100 Strips]

Bartovation Hydrogen Peroxide H2O2 Test Strips, Low Level, 0-100 Ppm [Vial Of 100 Strips]

Product ID: 280483540

Details

Brand
Bartovation
Manufacturer
Bartovation
Recommended uses for product
Drinking Water
UPC
643845994921
Unit count
100.00 Count

🔵Color change indicates peroxide level

⏱️Results in seconds

🇺🇸Proudly made in the USA

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Description

🔬 Stay ahead of contamination—test fast, test smart!

BULK CONFIDENCE - Vial of 100 strips means you’re always ready to monitor and maintain optimal water quality.
INSTANT CLARITY - Get accurate peroxide readings in just seconds—no waiting, no guessing.
TRUSTED QUALITY - Highly rated with 4.7 stars and made in the USA, ensuring reliability and peace of mind.
PRECISION CALIBRATED - Measures peroxide levels from 0 to 100 ppm with six distinct calibration points for pinpoint accuracy.
VERSATILE SAFETY CHECK - Perfect for testing drinking water, pools, and hot tubs to ensure safe, clean environments.

Bartovation Hydrogen Peroxide H2O2 Test Strips provide quick, precise detection of residual peroxide levels from 0 to 100 ppm. Ideal for drinking water, pools, and hot tubs, these 100-count strips deliver reliable results in seconds with a clear blue color change. Proudly made in the USA and highly rated for accuracy and ease of use.

Specifications

ASIN	B01N49KQLQ
Brand	Bartovation
Brand Name	Bartovation
Customer Reviews	4.7 out of 5 stars 446 Reviews
Manufacturer	Bartovation
Model Number	PPX02V100
Number of Items	100
Part Number	PPX02V100-ML
Recommended Uses For Product	Drinking Water, Pools, Hot Tubs
Recommended uses for product	Drinking Water, Pools, Hot Tubs
UPC	643845994921
Unit Count	100.00 Count
Unit count	100.00 Count

Reviews

T**G

Seem to work perfectly

Does what it says - when using the test strips, the colours really match the printed packet.

13.04.2026

P**H

Tutto perfetto

Consegna veloce e prezzo qualita`ottimo!

25.10.2020

R**.

Works great with cold plunge

I use these strips to measure out the hydrogen peroxide in my cold plunge and they work very well.

1.07.2025

P**E

Works Great

We use these to test our hot tub and they are very accurate.

19.04.2025

A**A

Value

Work very good and as accurate as my original strips for less money

24.04.2026

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

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