9x27x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety This vegetative-specific formulation contains:

This vegetative-specific formulation contains:

Used by growers for several generations

Lil Boss & Lil Boss Deluxe

if one of the many essential trace elements is deficient in the soil

pH Perfect® Sensi Grow is specially designed for use with diverse hydroponic growing media and all continuous liquid-feed growing systems such as aeroponics

9x27x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety This vegetative-specific formulation contains:Nordic Pure Custom MERV 10 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