18x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack nutrients-and-supplements when you set up a

when you set up a tray of rockwool or oasis cubes water with Hum-tea

Summit Mosquito Dunks

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

Measurement can be displayed with tabulated data or as a graph

Kings Mix is a well-aerated

18x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack nutrients-and-supplements when you set up aNordic 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