Wouldn't you know, I lost the damn manual... Checker by Hanna PH meter

Found the calibration instructions, But it says I need a PH 4.0 in adition to the PH 7.0 solution, and it only came with the PH 7.0....

There aren't any hydroponic shops around here.. However there is an aquarium store... do you think they would sell it? dunno what to do...
Illusion Reviewed by Illusion on . Stupid PH Meter!! Wouldn't you know, I lost the damn manual... Checker by Hanna PH meter Found the calibration instructions, But it says I need a PH 4.0 in adition to the PH 7.0 solution, and it only came with the PH 7.0.... There aren't any hydroponic shops around here.. However there is an aquarium store... do you think they would sell it? dunno what to do... Rating: 5