Ahmed, Ammonia is extremely ...

Ahmed, Ammonia is extremely toxic to aquatic life, especially larvae, so a first step would be to consider treating the ammonia discharges at source if possible. This would be the best solution for the environment as a whole and would probably make the source water cleaner in other ways too.

If treatment at source is not feasible, you can use aerated sand filters to remove both ammonia and solids simultaneously. They are similar to conventional sand filters but operated in a way which allows a thin nitrifying biofilm to develop.