U.S. Pool Supply Test Kit Refills – Pool & Spa pH, Chlorine & Bromine Testing

Keep your pool water balanced with reliable refill solutions

Designed for home pool and spa care, the U.S. Pool Supply test kit refills provide convenient, ready-to-use chemistry for checking essential water balances. These refill solutions work with standard test kits to help you monitor chlorine, bromine, and pH levels, supporting a safer, more enjoyable swimming environment.

The refill set centers on two key solutions crafted for precise color-based readings. One is a dropper bottle of OTO (Orthotolidine) chlorine test solution, and the other is a dropper bottle of Phenol Red pH test solution. Each bottle holds 1/2 ounce and is designed for straightforward dosing, so you can conduct routine checks without fuss. When used with the test kit’s tubes and color charts, these solutions translate pool chemistry into visual cues you can act on.

What’s included

• Two standard refill solutions for pool and spa chemical testing
• 1/2 ounce dropper bottle of OTO chlorine test solution
• 1/2 ounce dropper bottle of Phenol Red pH test solution
• Compatibility with common test kits used for chlorine, bromine, and pH measurement
• Typical procedure uses 5 drops of each solution per test with pool water

How to use these refill solutions

• Fill a test tube block with a pool water sample.
• Add 5 drops of the chlorine test solution (OTO) to the sample.
• Add 5 drops of the pH test solution (Phenol Red) to the same sample.
• Cap, mix gently, and compare the resulting colors to the kit’s reference chart.
• Record the readings and adjust chlorination and pH as needed for your routine maintenance.

Why these refills are a practical choice

• Compact 1/2 oz bottles offer easy, controlled dosing for consistent results
• Designed to fit standard pool and spa test kits, simplifying your setup
• Clear color outcomes help you track changes over time without guesswork

Tips for daily pool care

• Keep a regular testing cadence, especially after heavy use or weather changes
• Store bottles in a cool, out-of-direct-light location to preserve color integrity
• Document readings to spot trends and maintain balanced water chemistry

These refill solutions offer a practical way to support routine pool and spa testing. They are intended to assist you in monitoring chemistry with commonly used test kits, helping you maintain clear water, comfortable balance, and a safer swimming experience.