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Total Grow Control pH-EC Controller
The name "420" references the area of the light spectrum produced by this lamp
Package Dimensions: 275mm(L) x 87mm(W) x 94mm(H)
Pour solution around the base of each plant site
fertilizers
21_1/2x23_5/16x1 MERV 14 AC Furnace Filters 6 Pack Hydro Systems Total Grow Control pH-EC ControllerNordic Pure MERV 14 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.
