Infusion Pool Products V-fitting for Inlet and Return Line Venturi (White)

Currently have rotating eye fitting on each side of steps on inground pool. Not enough flow to help keep dirt off steps. Will these help?

Does this really raise water temp? My pool is 4 feet

Can I aim this up to make it like a fountain? I do that with my current one and am wondering if this will be more powerful?

I have a fiberglass pool with the circulator jets. Gone through two sets in 3 years because the circulators fail. Will this jet be sufficient?