17x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack propagation trays The Quantanium dry tumbler is

The Quantanium dry tumbler is a resistant to damage and the non-stick properties prevent trichomes from sticking to its surface

which enables the data logging of pH

An enhanced biodegradable engineered media for hydroponic seed propagation

• Reduce fungus and bacterial damage

Scleroderma cepa

17x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack propagation trays The Quantanium dry tumbler isNordic 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