After the balancing of my water was completed a few weeks back, I've been able to hold free chlorine. I'm consistently between 2ppm and 3ppm and have been adding about 2 gallon per week.
I brought my stabilizer up to 60ppm two weeks ago when I added chlorine. At the time, I was showing 2ppm combined chlorine. I tested the water again a few days after this and it showed 0ppm. More chlorine, waited 48 hours, tested again and it's 0ppm.
I shock the pool, bringing total chlorine up to 10ppm. Check the next day and I have 5ppm free, 2ppm combined, 7ppm total.
Checked a few days later and I'm back to 3ppm free, 0ppm combined. Stabilizer is still at 60ppm.
Why can't I seem to hold combined chlorine, even with stabilizer staying consistent and free chlorine available?