We uncovered our pool Sunday and have been shocking the aglae away since. It's almost gone, water's now a slightly cloudy blue and FC has been close to holding all day. I was going to do the overnight test tonight but am almost out of R-0071 drops! I just ordered some but it will be a couple of days till it gets here. What do I do?? CYA is 50 so FC needs to be 20, too high to use the other tester. Any suggestions??