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Static pressure for dummies like me No ducts, filters, or obstructions = lower static pressure Ductwork, bends, length, carbon filter, and light goods = high static pressure Axial fans used for lower static pressure Centrifugal fans used for high static pressure, ductwork, carbon filter, etc...

my plants have been growing very well. Today I noticed this. This is one of the first leaves this plant sprouted. She’s about a month old. The very edges of this leaf are starting to lighten and curl downward a little bit. There is a lot of thick growth up top so the bottoms don’t get as much...

My first grow ever.. i made my grow box out of a dresser. I put one 6” duct fan through the top directly above the grow light to remove heat and two 4” holes in the front and side for passive intake. The black indica feminized seeds are from crop king seeds. I germinated and planted straight...