17_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack pots 60 to 330 Watts Dimmable

60 to 330 Watts Dimmable design

For heavier infestation cover 1

It can be used on over 40 different categories of plants

non-pathogenic saprophytic fungus isolated from plant material

This amino acid based product tricks the plant into thinking it's heat stressed

17_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack pots 60 to 330 Watts DimmableNordic Pure Custom MERV 7 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