15x24x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow System/ Trays/ Reservoirs Use lower rates at initial

Use lower rates at initial planting

especially with PhysioSpec Greenhouse spectrum

Special soluble non-acidifying sulfur provides increase in chlorophyll formation and availability of potassium

Steam is delivered into the grow/drying room via the Fan Pack

15x24x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow System/ Trays/ Reservoirs Use lower rates at initialNordic 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