15x24x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Lighting Systems/Kits Our clever pH controller automatically

Our clever pH controller automatically monitors and fine-tunes the pH levels for you

Increases resin production/essential oils

Inside Dimensions: 16" x 40" x 4

Flood & Drain / Ebb & Flow Systems – A top choice for flood-and-drain setups where free drainage and oxygen retention are critical between flood cycles

Its ability to attract predators like hoverflies also showed promising results for use in reducing moth eggs around crop areas

15x24x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Lighting Systems/Kits Our clever pH controller automaticallyNordic Pure Custom MERV 7 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition