Hope everyones memorial day weekend went well. We are in contract to complete a 44x22 vinyl salt water rectangular pool with a 6x6 spa built into one corner with no spillover and a 15' x 7' tanning ledge with descending stairs next to it. Pool is a non diving pool with a little under 35k gallons. We are located in Long Island so the pool/spa combo will see about 4-4.5 months of use. I am looking for the opinions on the most energy efficient, simplest pumping design possible. The pool will be a black sand liner with all black swimmers and returns/to mimic a gunite look/finish. The pool/spa will not be simultaneously heated so I was thinking of going 1 pump, 1 cartridge filter, 1 400k nat gas heater but opinions on the setup are wanted/welcomed. The spa will have 8 jets so I figured I would need a filter/pump that can handle around 120 GPM for the spa when running and about 75 GPM for the pool. Please fire opinions away. i attached a pic of our layout. Please disregard the spillover section in the spa as it no longer there.