Abstract: Disclosed embodiments include apparatuses, systems, and methods for circulating and managing temperature of a liquid in a vessel. An illustrative embodiment includes an apparatus having a control section with a pump to receive liquid and expel the liquid via a pump outlet, a temperature interface to modulate a supply of energy, and a control interface to direct operation of the pump and the temperature control interface. An immersible section is configured to be at least partially immersed in the liquid and includes at least one temperature control surface to heat the liquid in response to the energy received from the temperature interface, a pump inlet to draw the liquid into the pump, and a filtration housing covering the at least one temperature control surface and the pump inlet to prevent particles over a predetermined size from passing into the pump inlet and coming into contact with the at least one temperature control surface.