Thursday of last week cleaned pool everything was looking good. Friday my wife had a few friends over and everything still fine. Woke up Saturday and the pool was green. Checked all levels and no FC. Added stabilizer and shocked pool that night. Also dropped in chlorine tablets in the skimmer to help. Pool has now cleared up but not totally clear yet but I do have signs of algae. When I checked the SWG the readings were good but no lights on the system. Everything seemed like it was running ok but I guess this was why I had no chlorine. Salt level was at 3300. Since the system seems to be working do we just need to replace the fuse? Anyone else had this problem. Thanks JB