12_1/2x23_1/2x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl_spectrumking Adding a small amount improves

Adding a small amount improves the utilization of standard feed mixes

6x6ft(veg) grow space

even ripening

Weight - ~13

The HI98107 tester features a large multi level LCD which displays both pH and temperature readings simultaneously

12_1/2x23_1/2x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl_spectrumking Adding a small amount improvesNordic Pure Custom MERV 8 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