I have some Roto type 1.5 inch threaded that sometimes swirl around. I have yet to figure out why sometimes they swirl and sometimes don't. Even at high pressure they just sit there..... it's ok so far because by the time i'm in the spa I don't care - but would prefer to have them work correctly. I have a 1.5 hp air supply blower that seems to work good.

What else is available that works good on an inground pool/ integrated spa- using an IntelliPro Pump so it's variable speed and have enough valves to push water anyway I want.