Thanks, Dave! Before I add the bleach I have another question. . .The pool store tested for metals and said that the copper is at 10 and the iron is at 6.6. They said to add 10 bottles of Omni (sequestoring stuff?!?). They also said not to add chlorine again until the metals were down. When the chlorine was added previously, the pool immediately turned green. I assume that was a reaction to the Omni stuff? Anyway, should the water be tested for metals again or should I go ahead and get the chlorine and pH where they belong. THANK YOU!!