13x23x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake ebb & flow

ebb & flow

Wilts & Blight

7 for optimal plant performance

high and low alarm control lockouts

CalCarb helps in recovery by increasing photosynthesis in the foliage that is not too seriously damaged and by raising the surface pH of damaged foliage which deters airborne pathogens form taking advantage of the weakened cellular tissue

13x23x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake ebb & flowNordic Pure Custom MERV 14 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