TDS stands for Total Dissolved Solids, which refers to the amount of dissolved particulate in your aquarium’s water. The TDS level in your aquarium’s water could be high for a variety of reasons, including overfeeding, overstocking, and poor maintenance practices.
To lower the TDS in your aquarium, you can try using RO (reverse osmosis) water, deionized water, or rainwater. Changing the water regularly and practicing controlled feeding can also help to lower TDS levels.
It’s important to note that different types of fish require different TDS levels. For most freshwater fish living, a TDS level of 400-450 PPM is recommended. However, it’s best to research the specific requirements of the fish species you are keeping in your aquarium.