Buy very high level Indigo™ brand 10000ppm QUAT test strips, only $15.95/ 100 strips; buy more & save with our extended shelf life.
Indigo™ brand hydrogen test strips are Made in USA & tested for accuracy using NIST compliant standards.
Chemical control of certain invasive species can be effected with 4000-5000ppm levels of quaternary ammonium sanitizer solutions such as Super HDQ, Quat 4 or GS 256. These can be measured with 10,000ppm quat strips.
Test Strip Documentation
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