Air Bear 20x25x5 (4 7/8) Replacement 266649-102 MERV 13 Air Filters 1 Pack ph-ec-tds-meters-and-solutions A magnesium deficiency inhibits photosynthesis

A magnesium deficiency inhibits photosynthesis

Alerts you when HALO needs calibration

• Maximum product absorption and coverage on all plant surfaces

VLGR Technology – Delivers energy efficiency and allows for the smoothest environmental control over your grow

These LED Strip Lights last on average five times longer than traditional T5 lighting

Air Bear 20x25x5 (4 7/8) Replacement 266649-102 MERV 13 Air Filters 1 Pack ph-ec-tds-meters-and-solutions A magnesium deficiency inhibits photosynthesisImportant 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,