Hanna Instruments Electrode Cleaner, 500 mL Seedling Heat Mats It is effective against wide HGC736746 It is effective against wide varieties of dangerous microorganisms including:bacteria germs viruses fungi spores molds & mildews Hanna's cleaning solutions eliminate impurities and residues that are left on electrode surfaces when immersed in samples during measurement or when stored incorrectly the instrument assumes that the electrode is clean and that the standardization curve created during the calibration process will remain a valid reference until the next calibration The Hanna Instruments Electrode Cleaner is a general purpose cleaning solution that can be used for a variety of applications