Since this isn't our pool I'm hesitant to buy a test kit so I brought water in to the pool store (I know you don't trust those results but its the best I can do). We had the filter running 24/7 for 2 days (SWG) to clear out the green. It looks great now but the test says the FC and total chlorine is 9. Is that because of running the filter for 2 days straight?
Total Chlorine 9
Should I do anything or leave it?