Check the listing for details. Chest Freezer To Cold Plunge Control Box And Pump. Condition: Used. Listed at 350.00 USD. This control box is set up to control a converted chest freezer into a cold plunge. Plug the freezer into the WiFi controlled Elitech thermostat and wirelessly control your freezer temp. Sanitation is controlled by the Ambohr Spa Ozone generator (same used by The Plunge) which is controlled by a kitchen timer. The pump and filtration system is the legendary Apex 86 filler powered by a 1200gph Danner pump. 5 brand new filters included, as well as a cleaning hose that can be attached to the pump to clean out debris from the bottom of your cold plunge. The base of the pump has slightly separated from the sides, but this doesn’t affect function and actually helps when cleaning as it’s easy to get disinfectant solution into the pump for cleaning.