12x24x4 (3 5/8) Pleated MERV 7 Air Filters 2 Pack Gardening Accessories The Matrix is reusable and

The Matrix is reusable and can sit on top of or fit into your pot

Most growers notice improved soil texture within 2–4 weeks and measurable plant response within 4–6 weeks

Evaporation from the tray on hot days helps prevent leaf scorch in the same way a gravel tray would

The module converts analog 0–10V and 0–11

It's specifically designed to protect beneficial bacteria in organic compost

12x24x4 (3 5/8) Pleated MERV 7 Air Filters 2 Pack Gardening Accessories The Matrix is reusable andNordic Pure 12x24x4 Pleated Air Filters MERV 7 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, bacteria, mold spores and other contaminants are removed. All Nordic Pure pleated air filters are manufactured using a heavy duty, moisture resistant beverage