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Help Your Plants Grow - Fast
Fits two propogation trays side by side
then slowly increase concentration every 2 weeks until you reach 25-30 ml/gallon
They work great for controlling heat mat temperature
(Vapor Pressure Deficit) The user can select the minimum and maximum allowable (limits) for temperature
25x28x1 MERV 13 AC Furnace Filters 6 Pack coco Help Your Plants Grow -Nordic Pure MERV 13 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 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200