9_3/4x23_3/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack soil Blend promotes stronger & bigger

Blend promotes stronger & bigger root systems

Chemboys Nutrient Line Alpha (used in conjunction with Chemboys Nutrient Line Beta Formula) provides a combination of essential nutrients that helps to ensure plants thrive at every stage of the growing process

dry matter and fruit set

fruits and berries

Use in conjunction with LTL Controls line of CO2 Generators

9_3/4x23_3/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack soil Blend promotes stronger & biggerNordic Pure Custom MERV 12 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