20x25x5 1/4 (5.25) Goodman/Carrier/Amana Replacement MERV 12 Air Filters 1 Pack Bio-Fertilizer The ONA Carbon-Air is easily

The ONA Carbon-Air is easily connected to your existing ventilation system to distribute ONA throughout your room or air exhaust system

so you can create the best nutrient environment for your plants’ growth

The Q Plug provides excellent aeration and buffering for root development with superior water control over other propagation plugs

Optimize Coverage - 3ft × 3ft

20x25x5 1/4 (5.25) Goodman/Carrier/Amana Replacement MERV 12 Air Filters 1 Pack Bio-Fertilizer The ONA Carbon-Air is easilyImportant 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 3 8 and 4 7 8 inch depth filters,