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pH Minus Dry Acid
it used to lower pH, maintain balanced water, and total alkalinity in swimming pools and spas/hot tubs.
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Palladium Chloride Passivation Test Kit
During test on passivated stainless steel, A black spot will appear when the surface has not been passivated correctly. Various qualities of passivation will give graduations of grey shades, ranging from light (acceptable) to dark (unacceptable)
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