The 7 in 1 Aquarium Test Strips are a versatile and easy-to-use tool that can be used to test the pH, nitrite, nitrate, total alkalinity, and carbonate hardness of your fish tank. These strips are made from a durable plastic material that is resistant to cracking and breaking, and they come in a convenient carrying case that makes them easy to transport and store. With these strips, you’ll be able to keep your fish safe and healthy.