16x36x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Environmental Controllers as the plant forms its

as the plant forms its own kind of "sunscreen" to protect itself from the ultraviolet light

Features include a long range igniter

display lock

Use in conjunction with Success Nutrients plant food and supplements

16x36x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Environmental Controllers as the plant forms itsNordic 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