13x21_3/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack ph-ec-tds-meters-and-solutions Vermiculture / Composting Bins: Use

Vermiculture / Composting Bins: Use roughly 1

The absence of the frame eliminates shadows in the beam

Consider Botanigard WP or Mycotrol WPO (Organic) on tomatoes

0-hour REI (Re-entry Interval) & 0-day PHI (Pre-Harvest Interval)

We use a proprietary blend of minerals in our Cal Mag formula to help boost plant yields in fruiting and flowering plant varieties

13x21_3/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack ph-ec-tds-meters-and-solutions Vermiculture / Composting Bins: UseNordic Pure Custom MERV 8 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