Bluelab pH Probe Meter for Plant Germination (3-Pack) by Bluelab at Mill Hollow Nursery. Hurry! Limited time offer. Offer valid only while supplies last. 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.Easy to clean and fully waterproof. Tough polypropylene barrel base with bullet shaped glass bulb. Gel-filled making it maintenance free and providing a longer life.
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