Congrats on clearing that up and sticking with the long SLAM process! I know it's a pain in the rear and at times fells like your just pouring chlorine and money down the drain, but it does work, and you'll always end up with a pretty blue, clean pool in the end. Your pool is an excellent example that if you stick with it, a SLAM will clear up just about anything. Hopefully you won't have to deal with that nasty stuff again, and I hope your family gets better soon.