23_1/4x29_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Nutrients this is the high quality

this is the high quality premium nutrient line that professional gardeners trust

The Milwaukee MC120 pH Monitor is designed to continuously monitor pH

pH probes are sensitive glass instruments which age through normal use

Storage: Store this bag in a cool

23_1/4x29_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Nutrients this is the high qualityNordic Pure Custom MERV 13 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition