Hello all. I haven't had any issues during winter months with algae. Now as the pool temp has gone up, 81 degrees, I noticed a couple of yellow spots today. I have kept the FC at 10 to make sure algae didn't pop up. I went on a trip and brought it up to SLAM levels and today FC is at 18. I was brushing once a week but started to do it twice and run pump on low for 14 hours and high for 2. My question is how can algae grow with FC at 18? do I need to run the pump more for better circulation and/or brush 3 times a week.