Physics volume when making water isnt working?

I’ve made a physics volume for some water … I’ve checked the water volume box under the character movement settings on the right hand panel to make the volume act like water. Under the character movement panel for this volume the settings are …Terminal velocity, priority, fluid friction and then the water volume check box. The settings are working apart from Terminal velocity, the default value is 4000 I don’t want my character falling too far down in the water when they jump in to the volume, I changed it to 50 and nothing has changed I messed around with different settings I cant seem to find why it isn’t changing its value on screen???