Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 2 Pack commercial-lighting-fixtures Plasma Air ionizers are designed

Plasma Air ionizers are designed to produce minimal to no ozone

Magnesium Carbonate and Magnesium Sulfate

This formula is effective alone

This environmentally safe water pump is oil-free to prevent nutrient reservoir contamination

Speed: Variable 0-80 RPM

Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 2 Pack commercial-lighting-fixtures Plasma Air ionizers are designedImportant 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 3 8 and 5 1 4 inch depth filters,