Water TDS for biofloc

I have a pond in Guhna, Sonipat district, and my borewell water parameters show 3100 ppm of TDS and 7.5 - pH. I want to reduce the TDS level upto 1200-1800 ppm for fish farming. The TDS level of water in this area has increased significantly in the past few years and I am looking for a solution to counter this situation. Also need a suggestion, if this water treatment affects the growth of live stocks in any way. Appreciate the suggestions and solutions.