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replaceable double junction pH probe and temperature probe (for pH ATC)
Your plants will thank you for it
salt marsh caterpillar
Dissolve 1 oz (30 g) per 25 gallons of water
26x30x1 MERV 8 AC Furnace Filters 6 Pack Meters & Solutions replaceable double junction pH probeNordic 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