21_1/2x23_3/8x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack LUXX 200W BAR 208-277V increase yields

increase yields

Features and Benefits:

unlike other hazardous pH lowering agents

The unique formulation promotes immediate uptake for hydration and nutrition and keeps stems clear and free flowing

Technaflora's pH Up and pH Down are potent and effective

21_1/2x23_3/8x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack LUXX 200W BAR 208-277V increase yieldsNordic 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