I was just posting a list of stuff figuring the OP would like some thoughts.
If I had a horse that I was worried about not drinking enough I am not sure I would want to compound the problem by suddenly changing how their water is delivered to them. (Coming from someone who has a mare that does not drink when I hang a black bucket in her stall but will if I use a blue bucket. But the black water trough or rubber tub is OK.)
@Manni01 I live in an area that I think the style you have would not work, since it freezes for several months of the year here. I think it is great that they work for you and your barn. I also do all my own barn chores, along with a full time job, etc.
The poster who commented on saving money does not have the style you have Manni, but a style that has a reservoir. That is why I was asking them about their thought on the water savings.