22x29x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack complete-systems and 7" tall humidity domes

and 7" tall humidity domes and seedling tray/plug inserts

Use in veg and bloom stages to improve manganese and iron uptake

The amount of water is not critical

when mounting SPYDR fixtures

22x29x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack complete-systems and 7" tall humidity domesNordic 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