Krypto is nasty. I'm a manager at a waterpark north of DFW just outside the area. Luckily we keep Chlorine at 2-3.5 ppm inside and 4 to 6 ppm outside. PLUS we Irradiate the water with these awsome UV lamps that get installed after the sand element filters. Kills everything... We get people asking about Krypto everyday now. Gets annoying. As long as you follow the correct procedures and shock the water after each "fecal incident" you're good to go within 45 minutes.