Alkalinity Refill Reagents

Benchmark Alkalinity Reagent Kit

Overview

The Benchmark Alkalinity Reagent Kit is a refill set for the Benchmark Alkalinity Test Kit. It includes the core liquid reagents used to run the alkalinity titration, making it easy to restock your testing supplies without replacing the full kit.

This reagent set is designed for reef hobbyists who already have the required testing tools and want a convenient way to continue routine alkalinity monitoring.

What It Does

This reagent kit supports alkalinity testing in dKH using the Benchmark 5.00 mL test method. The test uses a mixed indicator and sulfuric acid titrant, with results calculated as:

dKH = mL of titrant used x 10

It is useful for tracking alkalinity consumption, checking dosing adjustments, and maintaining consistency in saltwater aquariums.

Who It’s For

This reagent kit is intended for hobbyists who already own the Benchmark Alkalinity Test Kit hardware and need replacement reagents for continued testing.

How to Use

1. Add 5.00 mL aquarium water to the test vial.
2. Add 1 drop of indicator.
3. Slowly add titrant while swirling.
4. Stop at the first stable endpoint color change.
5. Calculate the result using: dKH = mL x 10

Careful syringe reading and consistent endpoint technique will help improve repeatability.

What’s Included

• 118 mL alkalinity titrant bottle
• 7.5 mL indicator bottle

Important Notes

• Reagent refill only
• Designed for the Benchmark Alkalinity Test Kit method
• Uses a 5.00 mL sample volume
• For saltwater aquarium use
• Store sealed and out of reach of children

Purchase Confidence

The Benchmark Alkalinity Reagent Kit gives you a simple way to keep testing without replacing the full kit. It is a practical refill option for reef hobbyists who want to stay consistent with routine alkalinity monitoring.