Features: Comprehensive Testing: 2-way swimming pool & spa test kit includes oto and phenol red test solutions, allowing you to accurately test your pool or spa water for ph and chlorine levels. Easy to Use: Liquid reagent pH indicator phenol red comes in a convenient 20ml bottle, making it easy to add the necessary amount to your water sample for testing.Versatile: Our kit tests water for both pH and chlorine, ensuring your pool or spa is properly balanced. Maintain Proper Chemical Balance: With our reusable swimming pool spa water chemical test kit, you can easily maintain the proper chemical balance of your pool or spa water, ensuring a safe and enjoyable swimming experience. Accurate Results: OTO and phenol red test solutions provide accurate and reliable results, giving you the confidence to adjust your chemical levels as needed for a clean and healthy swimming environment. Notice:Actual color may be slightly different from the image due to different display and light effect.Please allow 1-3cm deviation due to manual measurement.Specifications: Material: Plastic Weight: 123g pH Reagent: 20ml Residual Chlorine Reagent: 20ml 1 * Colorimeter 1 * pH Reagent 1 * Residual Chlorine Reagent 1 * Box