21_1/4x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack biological fertilizer It provides enough growing volume

It provides enough growing volume to support a larger plant

CaMg+ helps optimize plant nutrition resulting in enhanced growth and healthier flowers and fruits

Monitor the electrical conductivity (EC) of the solution to maintain optimal range according to crop and production method

Ionic Bloom for Soil contains the highest quality minerals and is powerfully enriched with naturally occurring plant acids that increase overall nutrient uptake and enhance growth and yields of virtually every plant

21_1/4x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack biological fertilizer It provides enough growing volumeNordic 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