The Sun Oil issue
Great advice, LotBoy47 and Dusty. Our pool man follows a similar routine and chemicals for our pools of comparable volume, and they sparkle. Guests are not asked to pre-shower on account of sun cream. We haven't seen proper rain in months, but when we do get it in the winter, one knows all about it and the pools get a partial change of water. Its not dilution of the chemicals that is so noticeable, but there is an obvious change towards acid in the pH.