12x20x2 Furnace Air Filters MERV 8 Pleated Plus Carbon 3 Pack spl_ps Know your nutrient level –

Know your nutrient level – optimise growth by ensuring the right amount of nutrients for the growth stage of your plants

It poses no threat to people

The reflector is optimized and photometrically designed for an even commercial overlap pattern with a 136 degree aperture

For smaller or less shaped lenses check out the Classic HPS Clip-on

The Bluelab Conductivity Pen is the latest innovation for hand held conductivity meters

12x20x2 Furnace Air Filters MERV 8 Pleated Plus Carbon 3 Pack spl_ps Know your nutrient level –Nordic Pure 12x20x2 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material