25x28x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack micro-nutrients CalCarb is a unique form

CalCarb is a unique form of a simple and very common compound that contains both calcium and carbon

optional cutoff tabs on the bottom corners for drainage

Commonly used to help support tomatoes

RAW Bloom All-In-One is a tested blend of all 12 RAW soluble plant nutrients

Featuring multi-watt options and enlarged reflector for max canopy coverage

25x28x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack micro-nutrients CalCarb is a unique formNordic Pure Custom MERV 10 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