Use quick & reliable Indigo® 0–100 ppm phosphate test strips for water, soil, or nutrient solutions. They are ideal for labs, hydroponics, education, and wastewater monitoring.
Indigo® 0-100 ppm Phosphate Test Strips provide a fast, practical method for screening phosphate levels in water, soil extracts, and nutrient solutions. Common applications include environmental and watershed monitoring, hydroponic and greenhouse nutrient management, wastewater and bioreactor process checks, and classroom demonstrations. Each strip delivers a clear colorimetric result in under one minute, with no reagents, meters, or glassware required, making routine testing simple and accessible in both field and laboratory settings.
We've been selling phosphate test strips since 2009. Buy fully documented Indigo® phosphate test strips, 50 strips/vial. Guaranteed 3 year shelf life (dated back from expiration date "yyyy.mm.dd").
Understand ion–color reactions used in phosphate detection; interpret ppm concentration data; apply solubility and precipitation principles to nutrient analysis.
Biology
Explain the role of phosphate in plant growth, ATP production, and cellular metabolism; link nutrient imbalance to ecological effects such as algal blooms.
Environmental Science
Assess water samples for nutrient pollution; model the phosphorus cycle; discuss regulatory strategies for controlling eutrophication and protecting ecosystems.
Agricultural & Soil Science
Correlate phosphate concentration with soil fertility; evaluate fertilizer efficiency and runoff management; promote sustainable nutrient cycling practices.
Education & Outreach
Demonstrate real-world testing methods safely in classrooms; integrate chemistry, biology, and ecology concepts through hands-on inquiry-based learning.
These 100 ppm phosphate test strips support a wide range of educational and technical uses from hydroponic nutrient control and greenhouse water management to classroom phosphate cycle demonstrations and wastewater monitoring. Together, this sampling of applications illustrate the versatility of simple colorimetric phosphate testing for both learning and real-world water-quality management.
Related information or images
Environment/Watershed
Hydroponics & Greenhouse
Wastewater Treatment/Bioreactor
Educational Experiments
Specifications
This Indigo® test strip indicates the presence of phosphate. Results for ranges shown below can be read in 30 seconds.
Phosphate is measured in increments of 10, 25, 50 & 100ppm
Phosphate strips have a detection limit of 5 ppm.
The number of strips (50) vial is approximate.
These strips have a guaranteed shelf of 3 years from date of manufacture (indicated by expiration date).
Reseal the desiccant lined bottle immediately after removing a strip to ensure 3 year shelf life.
Vial must be kept tightly sealed & kept at typical room temperatures.
Documentation
A Certificate of Conformance is available on request after shipment.
Indigo® phosphate test strips are made in USA & calibrated with NIST standards.
Test Strip Documentation
Stability Statement
Certificate of Analysis
SDS
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