16x21x1 MERV 7 AC Furnace Filters 6 Pack growing-media Phydura breaks down naturally and

Phydura breaks down naturally and stays where you apply it — protecting your desirable plants while eliminating the competition

Zenport LPG2000 Zen-Tek Instruments liquid glycerin filled 0-2000 psi pressure gauge is an excellent choice for vibrating environments

There are four precision thermal probes included

SUPERthrive Bloom 3-12-6—Advanced Flowering & Fruiting Formula

16x21x1 MERV 7 AC Furnace Filters 6 Pack growing-media Phydura breaks down naturally andNordic 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