17_1/2x27x1 Trane Replacement MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl_fluence For hydroponics use 2 teaspoons

For hydroponics use 2 teaspoons of mycorrhizal fungi for every 10 gallons of tank reservoir

When used indoors

In the Matrix System water and nutrients travel into the Circulator

The dual molded wheels have a 4-inch diameter and allow stability and control for precise measurements

lightweight for user friendliness

17_1/2x27x1 Trane Replacement MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl_fluence For hydroponics use 2 teaspoonsNordic Pure Trane Replacement 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