DIY cold plunge for a gym - please link a similar thread if one exist^^

Want to build a plunge for a gym. My understanding is that a typical cold plunge is 5 min ish max. another person could be willing to wait 5-10 min for their turn. hence i see a need to have :

- chiller with flow rate of ~500 liters in 10 min or 50 L/min

- compatible UV-C filter and ozone filter

- water treatment ( additional, to be safe)

- ice bath made of stainless steel

- safety/maintenance protocol

please feel free to critique/comment, thanks in advance people!