I got my dolphin from the builder when they put in the pool. Unfortunately, he was a bit of a shyster and I got his "test" model, so didn't get a lot of stuff (think "what's in the box" and answer is almost nothing).
So...that being said...how do I know what brush is actually installed on it? The one on there now has these foam rings on the outside edges. Is that the combined brush? Or does the pvc brush have those too? And should I get a PVC brush for my vinyl liner pool?
And would I just pull the gray part to change it if I did buy a pvc brush? (or are there instructions somewhere about that?)