18x25x1 Pleated MERV 7 Air Filters 6 Pack spl_hgc Rinse the probe after use

Rinse the probe after use in fresh water and clean once a month to ensure the Commercial Truncheon Nutrient Meter remains accurate

Protect your crops the way nature intended

No more twisted cables mean probe cleaning and system calibration has never been easier

or smell of brewing compost tea

(7) raised air slots

18x25x1 Pleated MERV 7 Air Filters 6 Pack spl_hgc Rinse the probe after useNordic 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