15_1/4x15_1/4x1 Exact MERV 13 AC Furnace Filters 6 Pack cloning-&-seed-starting Double junction pH electrode with

Double junction pH electrode with 2m cable (BNC connector)

The result is a replenished natural microbial system on the roots of inoculated plants that increases crop productivity

Use warm water between 75 and 98 degrees Fahrenheit for optimum results

Storm flap over zipper adds an extra layer of protection

15_1/4x15_1/4x1 Exact MERV 13 AC Furnace Filters 6 Pack cloning-&-seed-starting Double junction pH electrode withNordic 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