13x21_3/4x1 Exact MERV 8 AC Furnace Filters 6 Pack CO2 This is important in determining

This is important in determining when the RO membranes need to be changed

1 - (1 L) of Blast Off

Some are recyclable or compostable

Two connectible 18" aluminum watering bands

The Bluelab pH Probe has a double junction reference which provides a longer life than many other pH probes and is a gel filled non-refillable probe

13x21_3/4x1 Exact MERV 8 AC Furnace Filters 6 Pack CO2 This is important in determiningNordic 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