The decision between using a water softener or dishwasher salt for your Bosch dishwasher depends on the specific water hardness level in your area and the manufacturer's recommendations for your dishwasher model. Let's discuss both options:
Water Softener: If your water has a high Total Dissolved Solids (TDS) level of 500, it indicates hard water. Hard water contains minerals like calcium and magnesium, which can lead to limescale buildup in appliances and reduce their efficiency over time. Using a water softener can help remove these minerals and prevent limescale deposits. However, water softeners are typically installed for the entire water supply of a house, rather than just for a single appliance like a dishwasher. If you don't have a whole-house water softener system, it may not be practical or cost-effective to install one solely for your dishwasher.
Dishwasher Salt: Dishwasher salt, also known as regeneration salt or water softener salt, is specifically designed for use in dishwashers with built-in water softening systems. It helps regenerate the ion exchange resin within the dishwasher, which removes the hardness minerals from the water. If your Bosch dishwasher model has a built-in water softener, it is recommended to use dishwasher salt to optimize its performance. The salt replenishes the resin and ensures effective water softening, preventing limescale buildup on your dishes and dishwasher components.
In your case, since your TDS level is 500, indicating hard water, it is likely beneficial to use dishwasher salt specifically designed for Bosch dishwashers with built-in water softeners. Check the manufacturer's instructions and recommendations for your specific dishwasher model to determine if it has a built-in water softener and if dishwasher salt is recommended.
If you are unsure or need further clarification, it's always a good idea to reach out to the manufacturer's customer support or consult a professional for advice tailored to your specific situation.