OK will do that. Also, I saw earlier that Pat said my SLAM FC is 16 would be safe to swim in @ or below 16. However I am a SWG pool, and it is below CYA level of 60. last test was @ 3.5, and I added the 10% bleach this morning so it wouldn't get lower. If CYA is below 30 and a SWG pool, is it ok to get in @ 3.5ppm FC?