20x20x4 (3 5/8) Pleated MERV 10 Air Filters 1 Pack reflectors and grow lights and it is recommended for

and it is recommended for greenhouses in moderate-to-warm climates

Hygrozyme is a concentrated enzyme formula and is an essential addition to any grow system

Geoflora BLOOM is best used as a top-dress during the flowering stage to provide the building blocks for high-yield flower sites

Dark Energy is a select blend of L-amino acids specifically chosen for each of their beneficial effects on plant growth

Earth Alive Soil Activator contains threes species of microorganisms – Bacillus subtilis

20x20x4 (3 5/8) Pleated MERV 10 Air Filters 1 Pack reflectors and grow lights and it is recommended forImportant 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 20x20x4 filter