20x25x4 (3 5/8) Pleated MERV 15 Air Filters 2 Pack Environmental Controllers Washington and Texas customers only

Washington and Texas customers only

and proteins to keep the root zone strong and pathogen-free

Grow More supplements are to be used in addition to normal soil applied fertilizers and do not compensate for the lack of good cultivation and mangagement practices

Filling reservoirs for compost teas and microbial inoculants sensitive to chlorine and chloramines

and feed lines\

20x25x4 (3 5/8) Pleated MERV 15 Air Filters 2 Pack Environmental Controllers Washington and Texas customers onlyImportant 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