Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 1 Pack grow-systems-trays-reservoirs Optimized Phosphorus Utilization – Patented

Optimized Phosphorus Utilization – Patented technology helps plants absorb and protect phosphorus sources for maximum reproductive output

thereby making conventional fertilizer utilization much more efficient

and UVSpec provides UV wavelengths to trigger stress responses and secondary metabolite production

The reservoir has an increased lip height

Slugs and snails will cease feeding shortly after ingestion and typically die within 3–6 days

Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 1 Pack grow-systems-trays-reservoirs Optimized Phosphorus Utilization – PatentedImportant 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,