Hi all! I have a bestway above ground 18' x 48" round pool. It's about 7,000 gallons because we don't fill it all the way so my youngest can stand with head above water. We have an Intex swg sand filter. We went away for the weekend and I out the swg on boost not realizing it would boost all weekend. Our chlorine is off the charts with the HTH 6 way test kit. It was also off the charts at the pool store here. They told us to add something to increase alkalinity since that was high. We added what they said and chlorine is still high. Prior to going to store we emptied about 1/3 of the pool and refilled. We haven't been running the swg since this happened. Our cya is 60. Our TA is 180. pH is 7.3. What can we do short of emptying and starting over? Our swimming season is short enough here.