About to have a pool party. Kids from 4 different daycare centers will be in attendance. An hour ago the local Health Department sent out a shotgun notice to all daycares that our fair city (or perhaps nation?) is experiencing an outbreak of Shigella and reminding centers to report illness, how to clean, etc. Of course, I have no reason to believe any kid that will be here in the next hour has Shigella or has been exposed to it -- BUT, if I wanted to bump my FC "just in case," what level should I shoot for . . . . my CYA is 30 to 40 and my current FC is 5, pH is 7.5. Thanks in advance for any info. Chem Geek, I searched for the answer but did not find it in layman's terms on TFP or Google -- sorry if I missed it.