15_1/2x29x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake Insulation class F

Insulation class F

Microbe Brew encourages rapid microbial colonization at the root zone and can be used in both hydroponic and soil applications

Outside in the summer and fall when the heat is on

Hortilux Super HPS Enhanced Spectrum grow lamps fine-tune your lighting system to provide optimum spectral energy levels that promote vigorous plant growth

• Full daylight spectrum 32 watt fluorescent grow bulb (150 watt equivalent)

15_1/2x29x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake Insulation class FNordic 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