12_1/2x23_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack reflective-and-greenhouse-films You will see stronger

You will see stronger

you can even use green cleaner on the day of harvest

The Bluelab Guardian Monitor Connect can connect wirelessly to a computer at the grow site via the Bluelab Connect Stick

Reapply if it rains within 24 hours

DIN connector and 1m cable (included)

12_1/2x23_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack reflective-and-greenhouse-films You will see strongerNordic Pure Custom MERV 13 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