21_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Sungrower Trellis Netting 1000’ and Shorter HI70300-050 is a GroLine storage

HI70300-050 is a GroLine storage solution prepared with reagent grade chemicals that can be used to ensure optimum performance of your pH and ORP electrodes

which in turn will increase fertility of the soil by forming humus

where it is chilled with dry ice

16” or 24” widths

Electrodes can become dirty from use and will produce inaccurate results even as they read correctly in a pH buffer

21_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Sungrower Trellis Netting 1000’ and Shorter HI70300-050 is a GroLine storageNordic Pure Custom MERV 7 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition