20x25x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 2 Pack shoe-cover Recommended Feeding: 1 ml per

Recommended Feeding: 1 ml per gallon

The Bluelab Guardian Monitor Connect

With unique chunk coir reducing soil compaction and carefully selected peat moss

Compact size

BULK (2-12-3) is a PK booster containing a blend of phosphorus

20x25x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 2 Pack shoe-cover Recommended Feeding: 1 ml perImportant 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 20x25x4 filter