Recently converted from baquacil and had passed all tests to finish conversion. Replaced sand and added CYA. Over the next week the pool began using chlorine extremely excessively. Went from 1/2 gallon a day to now about 2-3 gallons a day.
For the last week I have been bringing pool to a slam FC of 16 morning and night. In the morning I usually have 5-7 ppm of FC from the night before and in the evening it's usually at 0. So its using about 10 FC overnight and 16 through the sunny day. I have brushed and swept to no avail and the pool water has stayed crystal clear the whole time. There has been a little bit of "dirt" on the bottom that dissapates as soon as I brush it, I sweep it and it still comes back. It showed up after covering the pool with a tarp that had sand on it so I assume it is just silt. I am trying to get this pool balanced enough to install the SWG that I got. There have been periodic swimmers like one person every 3 days and I got in to brush the walls at one point.
Also what has been weird is that CC has remained 0 or .5 the entire time, I would figure with that much chlorine loss that some more CC would show up.
Any help is appreciated.