I'm dealing with an in ground spa that, according to inspection has had the blower/bubbler removed. This is an older unit and all I see is a pool pump/motor, a de filter, an air inlet sticking out of the ground, a gfi and an old massive and quite possibly disco era heater. I want to get this thing working, and maybe even have an understanding of it all. Any ideas on cost? Please pool gurus, help me.....