12x22x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack pumps-and-irrigation-supplies This portable refractometer is a

This portable refractometer is a convenient way to measure the Brix level of your plants

The Trichoderma strains in RootShield Plus help eliminate fungal pathogens by colonizing the root systems of plants

thus no tangling of the fibrous root systems

sediment-free water

It is suitable for both indoor and outdoor growing but is most recommended for indoor use for crops requiring a lot of water

12x22x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack pumps-and-irrigation-supplies This portable refractometer is aNordic Pure pleated AC air filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home or office. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, baking flour, mold spores and other contaminants are removed. Our filter media prevents the growth of bacteria or mold, resulting in a much healthier living space.