Hello from Georgia, we have a 27 ft diameter above ground pool since August 2021. Just recently, I lowered the water level and placed the level in the rinse position of course in error. It ran for 5 hours that night. The following day I found the water level down to the skimmer level. I am filling the pool back and repositioned back to filter. I started the pump....loads of air at the discharge.... how soon before its back to normal?