Changed the water in May. I use Bromine tabs, non chlorine shock (every four days depending on use). Water clarification, hp up, spa sparkle and foam away ( every seven days).
I just changed my filter. The one that was in was dirty.
Yes it is air jets. I empty the hottub every 5 months. I use bromine tablets and non chlorine shock. My pH is a little low which I'm gradually getting up.