17_1/2x27x1 Trane Replacement MERV 12 Plus Carbon AC Furnace Filters 6 Pack Water Heaters Chillers this lay flat design allows

this lay flat design allows growers to maximize plant height in even the shortest of spaces

mycorrhizae go to work right away

We recommend this blend for outdoor use

CNS17 Grow formula also combines high levels of calcium with sulfates and phosphates to guarantee a balanced spectrum of plant nutrients

17_1/2x27x1 Trane Replacement MERV 12 Plus Carbon AC Furnace Filters 6 Pack Water Heaters Chillers this lay flat design allowsNordic Pure Trane Replacement MERV 12 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