3% hydrogen peroxide can kill algae & bacteria that grow in fresh & saltwater aquarium environments. Use it to spot treat glass, rocks or decorations. Undiluted H2O2 can harm fish, invertebrates and beneficial bacteria. Use Indigo® 0-100ppm hydrogen peroxide test strips to ensure that residual levels are safe for fish, invertebrates & beneficial bacteria. So how much hydrogen peroxide to add? See directions below.
We've been selling hydrogen peroxide test strips since 2007. Buy fully documented Indigo® hydrogen peroxide test strips, 100 strips/pack with a guaranteed 3 year shelf life (dated back from expiration date "yyyy.mm.dd"); see storage requirements in Specifications.
Hydrogen peroxide can quickly lose strength after opening. Use our Hydrogen Peroxide Dilution Calculator AND Indigo® 0-100ppm hydrogen peroxide test strips to check yours before using. Let's assume you want to dilute 3% H2O2 but aren't sure if it's still good. A typical dilution is 1-1.5 mL per 4 litres (gallon) of tank water. What ppm should your test strip show? Follow these steps.
10 second response with readings at 0, 1, 3, 10, 50, 100ppm for residual level hydrogen peroxide measurement. The detection limit is 0.5 ppm with an accuracy: +/- ½ color chart unit
A Certificate of Conformance is available on request after shipment.
Indigo® Quat (QAC) test strips are made in USA & calibrated with NIST standards.
Test Strip Documentation
Stability Statement
Certificate of Analysis
SDS
Calibration Fluid CoA
Reviews (15)
2025-03-25
By far the cheapest, and most reliable. We do not go anywhere else for our test strips. They are accurate, easy to read and a great asset for our business. Thanks!
— Gravity Spa
2021-11-27
Quick services, their friendly helpdesk serves you well and provides the information you want to have.
— Geert
2021-06-29
We started using H2O2 in our swimming pool These test strips help us to keep the levels accurate. Easy to use and easy to read. Very happy with the product and with the results in our pool!
— Betty
2020-12-28
Quick service and reliable products
2020-11-05
Great customer service, arrived quickly, just as described, easy to read.
— Heide
2020-07-16
Perfect to balance H2O2 in hot tub.
— Jonathan
— Indigo:
Good to know. Some of the hot tub vendors who have contacted us over the years recommend the 400ppm hydrogen peroxide strips. Both are effective but outdoor hot tubs may be more susceptible to windblown algae as well as H2O2 breakdown due to sunlight.
2020-05-12
Excellent product , very east to read and quick results! Arrived sooner then expected!
— Rbarr1951
2020-04-28
I really appreciate the great services provided by Indigo Instruments. My order was shipped in a timely manner and my customer was very happy to receive the test strips.
Smooth transaction all the way around!
Definitely recommend this company.
— Renee
2019-08-08
Easy online ordering. Was ready for pick up in no time. Have always used these test strips from Indigo for testing my hot tub. They work great and are reasonably priced.
— Jim
2019-05-21
Product works good, price seems reasonable.
However, they didn't do what they said they would do for shipping. The site said orders before 11am shipped same day. My order was after 11am but, i felt it should be shipped next day which did not happen. It was handled as an order that came in after 11am the next day & then there was one more extra day delay for 'power outage'...disappointing!
— Wirkin Dawg
— Indigo: Sorry about that, have rewritten the guarantee. At least the product worked well!
2019-04-26
Very fast shipping, good order accuracy. The test strips are a cost effective way to accurately manage residual H2O2 levels.
— InSPAration Float Centre
2018-03-26
Great product, great service and great shipping speed!
Will purchase again !!
— Brad
2018-02-23
Great service; price and product. Canada Post dropped the ball. Paid extra for express post and package sat in Canada Post for 3 days then delivered on day 4.
Good to know. Some of the hot tub vendors who have contacted us over the years recommend the 400ppm hydrogen peroxide strips. Both are effective but outdoor hot tubs may be more susceptible to windblown algae as well as H2O2 breakdown due to sunlight.