13x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Trimming Shears Can be used with all

Can be used with all propagation media and growing systems that are used for hydroponic production

with minimal effort

an essential nutrient for plant health due to its role in cell walls

which prevents further spore development

You can connect up to 40 – 50 LED fixtures

13x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Trimming Shears Can be used with allNordic 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