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40% Water Soluble Magnesium
Covers the porthole so that evaporation of the nutrient solution is minimized
We recommend all Ultra Sonic Humidifiers be ducted
RapidRIZE Block 10"x10"x7" 700 11
14x16x1 MERV 7 AC Furnace Filters 6 Pack rock-bottom 40% Water Soluble MagnesiumNordic Pure MERV 7 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 and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters
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