The strip can help your fish grow well. Some fishes need it soft, some need it hard, and some very hard. Maintain the amount of hardness in the water by testing regularly. Avoid hard water in your kitchenware by testing the water daily. Hard water also reduces the lather of soaps, making it less efficient. If you have a water softener installed, check its effectiveness quickly by taking a water sample and testing with the strips. Hard water leaves mineral build up in pipes and hastens Ensure that soft water runs in your system by testing often. Water Hardness Test Strips are very sensitive to the environment and changes to temperature., Manufacturer: Ranuw