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 Peroxide Test Strips, Low Level, 0-100 ppm [Vial of 100 Strips]

Bartovation Peroxide Test Strips, Low Level, 0-100 ppm [Vial of 100 Strips]

Product ID: 155818838

Details

Brand
Bartovation
Manufacturer
Bartovation
Number of items
1
Recommended uses for product
Testing levels
UPC
643845994921

💯Accurate detection 0-100 ppm

🔵Color change indicates peroxide level

⏱️Results in seconds

KD 15.25

Duties & taxes included

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Description

🔵 Stay ahead of contamination with instant peroxide detection!

BULK READY - Vial of 100 strips means you’re always prepared for routine testing.
INSTANT CLARITY - Get peroxide levels in seconds—no waiting, no guessing.
TRUSTED QUALITY - Made in the USA with premium materials and a 4.7-star rating from 450+ users.
PRECISION CALIBRATED - Six clear calibration points from 0 to 100 ppm for pinpoint accuracy.
VERSATILE SAFETY CHECK - Perfect for drinking water, pools, and hot tubs—protect your health everywhere.

Bartovation Peroxide Test Strips provide fast, accurate measurement of residual hydrogen peroxide levels from 0 to 100 ppm. Ideal for ensuring safety in drinking water, pools, and hot tubs, these 100-count strips deliver reliable results in seconds with a clear blue color change, backed by high customer satisfaction and US manufacturing quality.

Specifications

ASIN	B01N49KQLQ
Best Sellers Rank	8,102 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 24 in pH Test Strips
Brand	Bartovation
Country Of Origin	USA
Customer Reviews	4.7 out of 5 stars 456 Reviews
Manufacturer	Bartovation
Manufacturer Part Number	PPX02V100-ML
Material	PE_(Polyethylene), PS_(Polystyrene)
Material Type	PE_(Polyethylene), PS_(Polystyrene)
Model Number	PPX02V100
Number of Items	1
Number of items	1
Recommended Uses For Product	Testing peroxide levels in drinking water, pools, and hot tubs
Recommended uses for product	Testing peroxide levels in drinking water, pools, and hot tubs
UPC	643845994921

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Good experience, but the tracking updates could be better.

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