20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack Air Purification Foliar Spray: Add 5-15ml/gallon of

Foliar Spray: Add 5-15ml/gallon of water

These systems are specifically designed for serious growers

Remove the detachable funnel lid and place it funnel-side down on your scale

We've incorporated DYNOMYCO® into every transplant cycle and the difference in early establishment is clear

Grow1 Electric Sprayers are ideal for both small and large-scale operations

20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack Air Purification Foliar Spray: Add 5-15ml/gallon ofImportant 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. We also carry 4 7 8 and 5 1 4 inch depth filters,