16x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 1 Pack Grow Strong especially during home improvements

especially during home improvements

SUPERthrive® Pro-Tekt® is a nutritional supplement for plants that’s in an easy-to-use liquid concentrate that’s ideal for hydroponic use

dilute the remaining slurry with more water and apply generously to the grow medium

it also offers a propagation area for growing

or starter plants of your choice

16x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 1 Pack Grow Strong especially during home improvementsImportant 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