7_3/4x25_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_hw 12 Vitamins and 21 Amino

12 Vitamins and 21 Amino Acids

Sterilized grain and substrate mix to meet mushroom nutritional needs

a gusted crotch

The Anden Model 5558 Humidistat makes it easy to check relative humidity levels in each grow area

7_3/4x25_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_hw 12 Vitamins and 21 AminoNordic 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