How can I maintain the proper pH level in my fish tank to prevent it from becoming too acidic?

To maintain the proper pH level in your fish tank and prevent it from becoming too acidic, you can regularly test the water using a pH test kit and adjust it by adding a pH buffer or using natural methods like adding crushed coral or limestone. It's important to monitor and maintain the pH level within the ideal range for your specific fish species to ensure their health and well-being.