400nm UVA at 1 watt per sqm for 3 hours a day – prawn indoor sun tonic…

…and thats just for the shrimp. We still have the bacteria to contend with and the non-UV light spectrum at varying depths and turbidity…

https://www.globalseafood.org/advocate/ultraviolet-a-photoperiod-regimes-have-varying-effects-on-pacific-white-shrimp/