How does the wavemaker’s heat affect water temperature?

These is only stator with Cooper coil inside, no electronic components in it. This is for the our DC pump and wavemakers that come with a controller outside. By this architecture, the heat that release from the motor will be controlled to least.
Do wave makers add oxygen?

saltwater. We all know it can push the water away from it and make the water constantly move and circulate. But does it have a benefit to add oxygen to your tank?