16_1/4x21_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack X Nutrients bloom Use throughout the entire growing

Use throughout the entire growing process

carbohydrates and dead plant material

scimitus life cycle lasts around 13 days and can accelerate or lengthen in different environmental conditions

Sachets on Sticks – Place one stick per propagation tray or pot

16_1/4x21_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack X Nutrients bloom Use throughout the entire growingNordic Pure Custom MERV 13 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