30x30x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Environmental Controllers Fully waterproof and less fragile

Fully waterproof and less fragile than all-glass electrodes because of its tough polypropylene barrel

Size: 24x21x13

Then drain and plant seeds into the desired medium

and sharpies

Clones: Helps increase the rate of growth of developed roots

30x30x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Environmental Controllers Fully waterproof and less fragileNordic Pure Custom 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 condition