Okay, so I've followed the TFP way since my pool was built 2 years ago. I've only used pucks when I wanted to maintain chlorine levels while adding CYA, then it's only chlorine and muriatic acid. I've been maintaining my chlorine levels to match the recommendation for a CYA level of 80. I keep it here because my pool is in full sun from 0600 until about 1800 and I live in the desert with temps in the 100's starting at about 1100. So, with an FC level of 7, my wife (who grew up with a pool chlorinated with nothing but pucks and "no problems" and has not understood my need to do things the TFP way) told me this morning that she has ashy skin whenever she gets out of the pool and her swimsuit has a chlorine line from where she sits in the pool for hours reading. I'm not sure what to tell her when she uses this as evidence that I'm keeping the chlorine level too high, so I'm coming to you all here for advice on this issue. I don't know why it's doing that to her when I'm keeping it where the PoolMath tells me to. Please help. Thanks.