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The difference is in the carbon
It works by oxidizing the outer cell membrane of vegetative endospore
Another approach is to veg and bloom plants only in this block
Kills the eggs
Put the dry powdered product mixed with water or compost tea into each hole
21x21x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Reflective & Greenhouse Films The difference is in theNordic 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
