hidroshop.mxhidroshop.mx/folletos/Manual_Pirahna.pdf · neutral. Readings above pH 7.0 are alkaline...
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hidroshop.mxhidroshop.mx/folletos/Manual_Pirahna.pdf · neutral. Readings above pH 7.0 are alkaline and readings below are acid. A desirable range is 7.2 to 7.4. PUMP MAINTENANCE