Morning everyone. Is this something that should concern me? My FC last night was 3.5 and CC 0, this morning the FC was at 2.5 and CC at .5. The CC was within limits but I lost chlorine overnight. Do you think this something to be concerned about or is this normal? I added more bleach this morning to put at a FC of 5 (My CYA should be around 40, it was added as the pool was filling 2 days ago).