20x25x2 Pleated MERV 8 Air Filters 3 Pack Lighting you can test both the

you can test both the pH of soil directly or after preparation of a diluted sample

Comes complete with installation hardware and instructions

spray it on your plants without using gloves or respirators

Can be used at any time in the growing cycle

it self-expands into a full fabric pot—saving you labor

20x25x2 Pleated MERV 8 Air Filters 3 Pack Lighting you can test both theNordic Pure MERV 8 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 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters