The problem is, this is at a vacation rental and I'm not close by, I'm 75 miles away. If it was at my home, having a chlorine tub and adding a bit of dichlor daily wouldn't be a problem. But there, I thought the floater would help keep sanitizer levels up. Since it isn't, I do leave pre-measured doses of dichlor for them to add each day (many don't) but that's not ideal.
At the end of a stay our cleaner does balance the pH and alkalinity and she'll shock with both a little bit of dichlor and MPS to get the bromine reading in the correct range.