8x8x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack food-&-water-storage if one of the many

if one of the many essential trace elements is deficient in the soil

Compounding performance in multi-light configurations

RHP certified

Optional humidity dome with integrated vents allow you to adjust the humidity level within the dome and provide more control

Recirculating: Use 5-10 ml of Royal Flush per gallon of pure water in your reservoir and run the system for an initial 20-60 minutes

8x8x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack food-&-water-storage if one of the manyNordic 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