24x24x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack Nutrients The GSI-1 knows when temperatures

The GSI-1 knows when temperatures in your indoor garden are too high and can automatically respond by dimming your lamps to mitigate environmental stress and plant damage

Xtrasun High Pressure Sodium (HPS) lamps are engineered specifically for use with both magnetic and electronic ballasts

Constructed of high-quality Japanese internal components using the highest grade pure copper coils and lines

Single-use sachets for convenience

an 8 oz package makes up to 800 gallons and a 2 lb package makes up to 3200 gallons

24x24x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack Nutrients The GSI-1 knows when temperaturesNordic Pure 24x24x4 Pleated Air Filters MERV 12 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, smoke particles, virus carriers, bacteria, mold spores and other contaminants are removed. All Nordic Pure pleated air filters are manufactured using a heavy