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I used a stain test kit on my plaster in ground pool and found Jack's no2 copper & scale remover was really effective at removing a stain I've watched build up over the last four or five years. I bypassed an old 1960s heater that I assume was the source of the copper staining and now I'd like to...

Thanks to this great site I have been able to adjust and maintain my pool for the last five years, including a bought with mustard algae that the SLAM method helped me overcome. I am currently facing some copper staining and high calcium levels, so I'm preparing to plumb a bypass to eliminate a...