Cowboy magic detangler is amazing. And it smell dang good. Haha
You don't have to use very much of it for it to do it's job well so that little tube goes a looooong way. I have some that I've had for 3ish years (using it pretty much every day on 12 horses during the summer) and it's still really full.
The shampoo is also amazing, it runs out a little quicker but I've had great success getting my white mare super white (and it wasn't even the stuff formulated for white horses) when normal horse shampoo wasn't cutting it.