I'm building a fairly large oasis pool with a 12' outside diameter and 9' inside spa (18" sitting ledge). 3' spillover to pool. Seperate 2HP jet pump for spa. 400,000BTU heater. PB planning on doing venturi jets, but a PB I ended up not using was saying I would appreciate a blower. PB said blower not really necessary...can be loud...something else to maintain. PB has venturi jets in contract. Thoughts?