Dear Swarnakar,

Please have a look at this links and PDF attachments.

http://www.solitudelakemanagement.com/blog/improving-pond-water-quality-through-phosphorus-reduction

http://www.aquaticbiologists.com/nutrient-control--water-clarity/bio-boost-phosphate-cleanser

Good Luck

Dear Arvind,

Ammonia and phosphate levels of pond water could be effectively reduced by water hyacinth (Eichhornia sp.), azolla (Azolla microphylla) and papaya (Carica papaya) stem.  Water hyacinth with papaya stem reduced ammonia by 67% and nitrate by 74%. Azolla with papaya stem reduced phosphate concentration in water by 80%.

Ref: Anuradha VR and Kalpana S (2015) Performance analysis of nutrient removal in pond water using water hyacinth and azolla with papaya stem. International Research Journal of Engineering & Technology 2(1):444-448.

I hope you find the information useful,

Thanks Sir ji