How badly have I messed up? We have one of those cheap pools from Walmart, about 10,000 gallons. Put some cyranic acid in skimmer and, about an hour later, I shocked it with a gallon of chlorine. Now the water is bubbling come out of the filter. Is there anyway to fix this? Should I try to back wash the cya out of the filter? (Have and Intex sand filter.) Or can I just go to bed?