14_1/2x19x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Reflective & Greenhouse Films per gallon of water applied

per gallon of water applied every 3-4 days

The sampling assembly provides a stable method to mount the pH and temperature sensors

3000K Spectrum recommended for flowering and 4000K recommended for Veg

Potassium Sulfate

14_1/2x19x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Reflective & Greenhouse Films per gallon of water appliedNordic Pure Custom MERV 14 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