Buoyancy Effector Issues

Can anyone assist with this? If my player falls into the water he gets bounced into the sky and then back down constantly. If I have a high density it makes the player float, but bounce in and out of the water, but low density, my player sinks.

I think it has to do with high density and a low surface level? But my surface level isn't showing the line when editing so I don't know how close to the surface I am.