I've been reading in the forums about how to balance the water of my pool. We live in a farming area where crop dusters spray the fields. I am sure some of that has affected our pool. I've been to the pool company about 10 days ago and did a test and they said everything was good, but that I needed to add phosphate remover. The phosphates at that time were at 578 ppb. We added the remover and it dropped the phosphates to 550 ppb, but did not affect the FC levels. You can see the results below. We've added a second round of phosphate remover and the chlorine still has not come up. From what I gather by reading the forums, we probably need to add liquid chlorine to the pool. I am just not sure how to know how much or what type to use. While we have had the pool since 1990, this is the first year that we have really struggled with chlorine levels like this. Any help is appreciated.