If concentrated Prawn poo-poo and water is considered an organic pollutant then this should do the trick….

Ultrathin Covalent Organic Framework Anchored on Graphene for Enhanced Organic Pollutant Removal.

Just target the poo-poo profile…which can only be a factor of inputs and metabolism.

https://onlinelibrary.wiley.com/doi/10.1002/anie.202206564

Operationalizing marketable blue carbon – Natural Climate Solutions (NCS) supporting prawn effluent…

https://www.sciencedirect.com/science/article/pii/S2590332222002068

Nutrient retention efficiencies in integrated multi‚Äźtrophic aquaculture – Prawn effluent treatments…

https://onlinelibrary.wiley.com/doi/10.1111/raq.12645