API High Range pH Test Kit for Freshwater & Saltwater Aquariums

The API High Range pH Test Kit accurately measures high pH levels from 7.4 to 8.8 in both freshwater and saltwater aquariums. This easy-to-use aquarium water test kit is ideal for African cichlid tanks, marine and reef setups, and any system that needs to maintain stable, higher pH. Regular pH testing helps create a safe, healthy environment for your fish, live plants, and corals.

Key Features

• Measures pH from 7.4 to 8.8 for precise, reliable readings
• Works for freshwater and saltwater aquariums
• Ideal for African cichlids, marine tanks, reef systems, and high-pH setups
• Includes test solution, glass test tube, and easy-to-read color chart
• Helps maintain stable, healthy water conditions
• Measures high-range pH from 7.4 to 8.8 using the included liquid reagent and color chart

How to Use

Fill the glass test tube with 5 mL of aquarium water, add the recommended drops of test solution, cap and invert to mix, then compare the color to the included chart to read your aquarium's pH level.

Frequently Asked Questions

Q: How often should I test my aquarium's pH?
A: Test weekly, or whenever you notice fish stress or changes in behavior.

Q: Why use a High Range pH kit?
A: It's designed for tanks that run above 7.4 pH, which is common in African cichlid and marine setups.

Q: Can this be used in reef aquariums?
A: Yes! It's great for reef, marine, and freshwater aquariums that need accurate high-range pH monitoring.

High Range pH Testing Note

This API test kit measures pH from 7.4 to 8.8 in freshwater and saltwater aquariums. API recommends weekly pH testing. Follow the enclosed test-kit instructions for the correct reagent amount and compare results with the appropriate color chart.

Which pH test should I use?

This High Range pH kit measures pH 7.4–8.8 in freshwater and saltwater. For freshwater below the high-range scale, use the regular API freshwater pH kit instead. Neither kit measures KH or GH. Follow the included color chart and directions for an accurate reading.

Choosing and Using This API Test

API liquid test for high-range pH (7.4–8.8); intended water type: freshwater and saltwater. Match the reagent instructions, sample amount, development time and color chart to this specific kit. Rinse the glass test tube after use, and never return the tested sample to the aquarium. This test measures one parameter (or the GH/KH pair for the combined kit), not a full aquarium-water profile.

Test Range and Package Information

High Range pH: 7.4–8.8. For freshwater and saltwater aquariums with relatively alkaline conditions. API lists approximately 160 tests, including reagent, glass test tube and comparison card. For readings below the scale, use an appropriate lower-range pH test rather than treating the bottom color as an exact measurement.