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heavy metals
Rubber grip on top for easy use
potted plants and planter boxes: Add 30 ml per 4 L (2 tbsp per gallon) of soil or growing medium
If the rejection % falls under an acceptable level (typically 90%) it’s time to change the membrane
Bluelab Replacement pH Probe clone heavy metalsBluelab Replacement pH Probe for Guardian, Combo, & pH Meter The Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter is easy to clean because of its bullet shaped glass bulb. Fully waterproof and less fragile than all glass electrodes because of its tough polypropylene barrel. Gel filled (non refillable) making it maintenance free and a double junction reference providing longer life! All probes are interchangeable between all Bluelab
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