Yes, you can vacuum your hot tub while it's filled with water. It is recommended to clean the hot tub while it's filled to ensure efficient cleaning. However, there are a few precautions to keep in mind: Use a Submersible Hot Tub Vacuum: Make sure you have a vacuum specifically designed for underwater use. These vacuums are equipped to handle water and can effectively clean your hot tub without any issues. Ensure Proper Electrical Safety: Before using any electrical equipment near water, ensure all safety measures are in place. Keep the power source and connections away from moisture to prevent electrical hazards. Avoid Overfilling the Hot Tub: Avoid overfilling the hot tub while vacuuming. Ensure the water level remains below the designated maximum fill line to prevent water overflow and potential damage to the vacuum. Follow Manufacturer's Instructions: Always refer to the manufacturer's instructions for your specific hot tub and vacuum model. They will guide you on using the vacuum safely and effectively. You can safely vacuum your hot tub by following these guidelines and using the appropriate equipment. At the same time, it's filled with water, ensuring a clean and enjoyable bathing experience.