28x28x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Nutriants • Prefilter: Yes

• Prefilter: Yes

or similarly

Add your own choice of growing media and plugs to get growing

Gross Weight: 16

waxes and lipids will coagulate and fall out of the solution

28x28x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Nutriants • Prefilter: YesNordic Pure Custom MERV 8 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