i start my pool/spa combo next week and i wanted to get some feedback from pool/spa builders. i am contracted for a 7' by 7' integrated octagon spa. the spa will have a dedicated 2.5hp pentair pump on 2.5" pipe on a 25' run. originally my builder was going to place 5 jets on 1 loop but i then wanted 7 jets. he now wants to use a 2 loop system for the 7 jets (3 jets on 1 circuit and 4 jets on a 2nd circuit). he would place a 3-port valve off the pump so that i could controll the flow to one or both circuits. i told him that i wanted a spa that "rocks" (lots of action). he said he has used this system on lots of commercial work and i will not be dissapointed. anybody out there ever plumb a spa this way and how effective is it?