15x19x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Nutrients and Supplements amino acids and vitamins that

amino acids and vitamins that maximize key growth factors like plant metabolism and nutrient uptake

Allows for more accurate readings

larger buds

The Stage 2 is designed to activate any device (pumps

15x19x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Nutrients and Supplements amino acids and vitamins thatNordic Pure Custom MERV 14 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