Sorry if I sound illiterate about pools ( 1st time pool owner & 1st post here )
Love my new ( to me ) pool / spa , but I've detected a bit of a problem.
When in spa mode ( manual valves at the pump station ) , I keep losing water in the spa ( assuming it's going back into the pool ) ... When we get in the spa the water level is right at the spillway back into the pool. After about an hour , the level of the spa has dropped 4 - 6 " and the jets are almost exposed.
When I return to pool mode ( by manually turning the valves ) the spa level returns to normal.
Am I correct in assuming that there is a leak in one of the valves that allows water to return to the pool or is it something else ?