From: ouasami@do-not-send.com   
      
   If this is not the right place for the question, please excuse me.   
      
   I use 65% calcium hypochlorite as the source of chlorine for my pool. If   
   I add no more than 4 lbs of the hypochlorite, the water stays clear. If,   
   however, I add more, say, 8 to 10 lb, the water turns milky. The fine   
   powder that makes the water looked milky takes 2 to 3 days to settle.   
      
   What could this white powder be? I think it might be calcium carbonate   
   but where does the carbonate come from and why it only happens when   
   relatively large amount of hypochlorite is added? One theory is when   
   small amount of the hypochlorite is added, no enough carbonate is   
   formed. So, it cannot be seen. I doubt it. Judging from the extent of   
   the milky color, even one tenth of it should be quite visible.   
      
   Another theory is that large amount of hypochlorite changes the PH of   
   the water. I'm not sure what result that would be.   
      
   Any thought?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)