18x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack nutrients-and-supplements Autopilot offers guidance for your

Autopilot offers guidance for your growing environment

Available in two standard sizes

An easy-to-fill reservoir delivers water and nutrients from below

Xtrasun II Wing Reflector features:

Pyur Scientific Acetone Pro 5 Gallon 99%

18x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack nutrients-and-supplements Autopilot offers guidance for yourNordic Pure Custom MERV 13 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