Got a new solar cover last week. Doesn't heat the water that much but I've noticed not losing as much FC which is great. We've had rain, rain and more rain for the last 5 days. Been maintaining the FC at 7 but this morning FC TEST WAS 9.. I haven't added bleach in 2 days and I did the test twice. Same both times
Is it possible solar cover could raise the FC. SCRATCHING MY HEAD HERE.