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"Mineral Stains
Mineral Stain Removal (HINT: this procedure may be used with all pools)
Lower pH to 7.2
Lower total alkalinity to 30 to 90 ppm
Run filter until stains are removed
If stains are not gone in 24 hours,
Lower pH to 6.8. Isolate heater from system when dropping pH below 7.0.
Make sure total alkalinity is 30 to 90 ppm.
Add Eclipse3's Enforce.
Run filter until stains are removed.
The above procedure is useful in removing mineral stains with all water treatment systems (except biguanide). Generally speaking, the newer the stain, the easier it is to remove. Fresh stains can be removed almost instantly while older stains may take several days to remove. Shocking with chlorine will set the stain and make it far more difficult to remove.
Some metallic stains are harder to remove and may require oxalic acid. Oxalic acid can be used on many different surfaces and is highly recommended for removing stains from fiberglass. It is very important to follow the safety precautions on the container when using oxalic acid. It is applied by pouring a few ounces in a folded cloth and rubbing on the stain. Rubber gloves should be worn."
SO:
Running the pump with a TA of 30 and PH of 6.8 on a pool plumbed with copper pipe is now OK? I guess so if these folks say "HINT: this procedure may be used with all pools"... All you have to do is isolate the heater!
WOW!
I recommend you read Eclipse 3 FAQ's on their web site prior to use, escpecially staining, need for other eclipse chemicals, swimmers hair, and waiting for 6 months prior to using on new pool surfaces. The FAQ's can be found here. http://www.eclipse3.com/tipstools/faq.asp