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MERV 14 Plus Carbon air filters are comparable to air filters with the MPR rating of 2800
Gypsy Moth
making them ready to use by the plants
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Basic pH Meter shoe-cover MERV 14 Plus Carbon airBasic pH Meter #840087 Simple to operate and works with any electrode with a BNC connector. Measures the full 0 to 14 pH range with a high 0. 01 pH resolution. Features 3 pt. calibration, hold function available, fold out easel back and a tripod screw. Comes with a 9V battery, calibration tool, and full instructions. PROBE NOT INCLUDED. Basic pH Meter Kit #840088 Includes everything necessary for immediate field use: Basic pH Meter 840087 Epoxy body,
