Features: Ensure the water quality of your aquarium with our 7 in 1 aquarium testing set. Fast and reliable results allow you to monitors nitrates, nitrites, ph, chlorine, hardness, and alkalinity level. Made of safe and environmentally friendly materials, our test strips are designed to provide accurate readings without any pollution. With just a quick dipping in the water and a color comparison, you can easily maintain conditions for your fish. Whether you're a beginner or an experienced, our easy to use test strips will help you ensure the health of your fish. Use our aquarium testing strips to regularly check the water quality of your fish tank, pond, or aquarium ecosystem. Wonderful for home aquariums, pet store, and even educational institutions, our test strips provide a convenient and reliable solution for maintaining a balanced and good aquarium environment. Specifications: Material: Paper Box Size: Approx. 4.6x4.6x10.8cm/ 1.81x1.81x4.25in Type: 50pcs, 100pcs Package Includes: 1 Box Aquarium Test Strips note: 1: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2: Due to the difference between different monitors, the picture may not reflect the actual color of the item.