20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 2 Pack hydro-systems do not like the sulfur

do not like the sulfur content in garlic extracts

This is the only dome on the market with adjustable top and side vents to better control humidity and temperature

Yucca Extract and Ocean Fish

Also wind is a factor affecting evaporation time

20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 2 Pack hydro-systems do not like the sulfurImportant 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 7 8 and 5 1 4 inch depth filters,