20x26x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems Think of SNS 311 as

Think of SNS 311 as immediate medicine for your plants (or a first aid kit)

Perlite #3 can be used as a stand-alone medium in drip systems or as a mix-in element with other growth mediums

Torched is formulated with natural ingredients—Clove Bud Oil

Growing in a compact space where every inch matters

Consult your local hydroponic store or garden center on nutrient regimes that will most benefit your plants

20x26x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems Think of SNS 311 asNordic 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