25x30x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl_fluence This fully balanced and chelated

This fully balanced and chelated base contains the highest level of minerals possible while still allowing for adjustments based on strain or stage specific plant needs

Once opened

the half inch (1/2") double media air filters provide exceptional air filter capacity and remarkable efficiency

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Supplementing calcium and magnesium is one of the secrets of expert growers and results in more vigorous plants and larger yields

25x30x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl_fluence This fully balanced and chelatedNordic 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