Terrible title, I know, but I don’t know the formal name LOL It’s the little container that you attach to the end of your hose, with options for off, water only, and on/shampoo. Clearly it dilutes the shampoo.
I’ve never been willing to spend money on one, but Santa Cruz sent a free bottle, and while I don’t pretend to think that all you have to do it spray, let sit, and rinse for a deep clean, the utter ease of getting the shampoo on the horse has me hooked!
There must be a starting point amount to put in there. Do you put it in full strength? 50/50 diluted with water?