Pawfly Aquarium Test Strips, 100 Count, 6-in-1 Digital Kit Refills

Pawfly 100 Pcs Aquarium Test Strips are refill strips for monitoring six key water parameters in freshwater, saltwater, reef, and breeding aquariums, with results compared against a color chart.

• 100 test strips — supports regular aquarium water checks.
• Tests six parameters — monitors pH, nitrate, nitrite, chlorine, total hardness, and carbonate.
• Official refills for Pawfly’s 6-in-1 Digital Water Testing Kit — made for use with the digital kit, which is not included.
• Standalone color-chart testing — lets you read results without the digital kit.
• Defined test ranges for each parameter — helps you interpret readings within the strip’s stated range.

Aquarium water conditions can change over time, so regular testing helps aquarists track key readings and make informed decisions about tank care. These strips are intended for routine checks across freshwater tanks, saltwater aquariums, reef systems, and breeding setups. They suit both aquarium hobbyists and professional aquarists who want to monitor multiple water parameters with one strip.

Which water parameters do the Pawfly strips test, and what are the ranges?

Each Pawfly aquarium test strip measures pH, nitrate (NO3), nitrite (NO2), chlorine (CL2), total hardness (GH), and carbonate (KH). The stated ranges are pH 6.2–8.4, NO3 0–250 ppm, NO2 0–20 ppm, CL2 0–10 ppm, GH 0–425 ppm, and KH 40–180 ppm. The strips are designed to detect minor changes in aquarium water readings.

• Six test results from one strip.
• Range information for interpreting each of the six readings.

How do you use a Pawfly strip for standalone testing?

Dip a Pawfly aquarium test strip in the tank water for 2 seconds, hold it horizontally for 15 seconds, and compare the color chart for pH, chlorine, GH, and KH. Read nitrate and nitrite at 60 seconds. This sequence gives you color-chart results without using the digital kit.

• Use the color chart to read pH, CL2, GH, and KH at 15 seconds.
• Check NO3 and NO2 at 60 seconds.

Are these Pawfly strips compatible with the digital testing kit?

Yes. These are official refills for Pawfly’s 6-in-1 Digital Water Testing Kit; the digital kit is not included with the 100 strips. They can also be used for standalone testing by following the dip, wait, and color-chart steps.

• Refill strips for the Pawfly 6-in-1 digital kit.
• Standalone color-chart testing is also possible.

Pawfly’s 100 aquarium test strips are suited to aquarists who want to follow six water parameters in freshwater, saltwater, reef, or breeding setups. They are refill strips rather than a complete digital testing kit, and also support standalone color-chart readings.

Read our guide: A beginner’s aquarium set-up checklist: from bowl to tank