20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 6 Pack New-releases providing the lamp plenty of

providing the lamp plenty of time to get to full power

your plants will still thrive

Significant increases in yield have been attributed to the addition of silicon to the feed schedule

2 flotation disks

CNS17 Grow formula also combines high levels of calcium with sulfates and phosphates to guarantee a balanced spectrum of plant nutrients

20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 6 Pack New-releases providing the lamp plenty 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. If you are replacing a 4 3 8 depth 20x20x4 filter