If I want to get my FC level up, can I use bleach even though I have a SWG? This year, I'm having trouble "shocking" my pool with my SWG. This pool just started its second year. Last year, I could easily raise my level by turning my SWG to 50% production and it would take maybe 4 hours. I've had my SWG at 100% the last few days and yesterday it tested FC of only 1. Last year, I did have a mineral cartridge, so maybe that helped? Anyway, can I add bleach to raise FC instead of using the SWG?