17x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack propagation trays An enhanced biodegradable engineered media

An enhanced biodegradable engineered media for hydroponic seed propagation

Par Value (PPF) - 189

How to use Alg·A·Mic™

reducing your exposure to potentially harmful radiation and discomfort

which enables the data logging of pH

17x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack propagation trays An enhanced biodegradable engineered mediaNordic 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