15x19x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Tents Each of the zones /

Each of the zones / rooms monitored by the Carbon-X can have 1 or 2 MBS-K30 CO2 sensors installed in order to satisfy local code requirements

Designed for projects that requires cooling or ventilation

Calibration of pH can be with 2 or 3 points

Stack may reduce transplant stress and improves plant vigor

Surety Soil takes that microalgae and tops it off with an NPK of 3

15x19x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Tents Each of the zones /Nordic 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