16x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack PH/EC/TDS Meters and Solutions A Tailored Growing Experience

A Tailored Growing Experience

Doesn't Kill – Deters insects from establishing in your grow space without disrupting the broader ecosystem or beneficial insect populations

5V button - 4 Included

A "Not Sure" setting is also available if your ballast type is unknown

2”) Weight 196 g (6

16x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack PH/EC/TDS Meters and Solutions A Tailored Growing ExperienceNordic Pure Half Inch Ring Panel AC Furnace Air Filters consist of an internal frame bonded between flat layers of two different types of electrostatically charged HVAC furnace filter media. The first layer is a high capacity, polyester filter material which acts as a pre filter, capturing large airborne particles. The second, more efficient, layer is a MERV rated smooth poly blend filter material. The electrostatic charge works as a magnet to draw in