16x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack bio soil – AGGRESSIVE FEEDING/LATE BLOOM: 6

– AGGRESSIVE FEEDING/LATE BLOOM: 6 ML – 8 ML PER GALLON

you can now still have ample growing space

If the rejection % falls under an acceptable level (typically 90%) it’s time to change the membrane

• Safeguard from freezing & pests

In this tray sits a stand covered by a sheet of absorbent cloth that draws water up and into the bottoms of the planted seed trays by capillary action

16x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack bio soil – AGGRESSIVE FEEDING/LATE BLOOM: 6Important Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 16x20x4 filter