20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack environmental-controllers B'Cuzz Bio-NRG Growth-C hydroponic nutrient

B'Cuzz Bio-NRG Growth-C hydroponic nutrient is suited for all stages of development in conjunction with B'Cuzz Root and Bloom Stimulators as well as Bio-NRG Flavor and Growth-C

The simplicity of this thermostat and its small design make it a useful addition to any grow room

Optional Photo Sensor Available for Sunlight Balancing in Greenhouses

Accurate dual-beam CO2 sensor

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack environmental-controllers B'Cuzz Bio-NRG Growth-C hydroponic nutrientImportant 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,