Hi there. I am firing up my spa for the first time and need some help with how to turn valves, etc. I have a pool with a spill over spa. I am not sure what I need to do in order to just heat up the spa and not the whole pool. The heated water comes out the 2 spa returns. No hot water comes out the spa jets. The spa has it's own pump, but I use the same sand filter for pool and spa. I am getting the spa to heat up but it continues to spill over into the pool and I don't know if that is right or not. Any help will be appreciated.