26x30x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack pest-and-disease-control • Perfect for Koi ponds

• Perfect for Koi ponds

and herbs will receive adequate nutrition during the vegetative and flowering stages

Improved growth of root system

a greenhouse

These MERV plus activated carbon

26x30x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack pest-and-disease-control • Perfect for Koi pondsNordic 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