21x27x1 Trane Replacement MERV 12 Plus Carbon AC Furnace Filters 6 Pack Controllers use less T-Rex and apply

use less T-Rex and apply in the first week of vegetation only

Simple CO2 controller with display and day/night detection

making transplanting less stressful to the clones

EZ-CLONE Cloning Collars are available in a new high density Hard material as well as the same great Soft material that we have been using for years

The attached reflector increases 30% efficiency

21x27x1 Trane Replacement MERV 12 Plus Carbon AC Furnace Filters 6 Pack Controllers use less T-Rex and applyNordic 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