Re: iron and copper
szampino, the reason I told bonni to raise the clorine is that she has a cya of 70. With a cya of 70 you need to have the chlorine between 5 & 10. The water may be cloudy from algae starting and never getting completely killed. It is more important to have a sanitized pool, you can swim with metal in the water, but I wouldn't swim with unsanitized water. If you have a cya level of 20 or less, then it is fine to keep your chlorine at 1 to 2 ppms. You just have to test often and not let it go down to 0, because then you are leaving yourself open to an unsanitized pool.
Gerri, as long as you have enough sequestering agent in the water, you will be able to shock without stains forming. If you keep your chlorine at the right level, and never get a combined chloirne reading, it isn't necessary to shock. You will get the hang of how your water reacts - when you shock, always bring your ph down to 7, or 7.2 before you add the chlorine.
Northeast PA
16'x32' kidney 16K gal IG fiberglass pool; Bleach; Hayward 200lb sand filter; Hayward pump; 24hrs; Pf200; well; summer: none; winter: mesh; ; PF:7.5
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