25x32x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack X Nutrients bloom The PreFilter eliminates bigger particles

The PreFilter eliminates bigger particles such as dust to prevent premature usage of the carbon

molds and other plant diseases

No guesswork as to how much or when to water

Simply select thecorrect lamp style and wattage and the ballast will now properly operate that waywithin the proper operational parameters

25x32x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack X Nutrients bloom The PreFilter eliminates bigger particlesNordic Pure Custom MERV 13 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