17_1/4x29_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack PH/EC/TDS Meters and Solutions making it a truly versatile

making it a truly versatile product that any grower can bring on with ease

It is virtually impossible to over-water plants with this formula

Enclosure resists dust

Whether you're starting on a fresh setup or replacing outlets in an existing area

17_1/4x29_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack PH/EC/TDS Meters and Solutions making it a truly versatileNordic Pure Custom MERV 10 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