12_1/2x23_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack X Nutrients bloom • REI: 4 Hrs• Active

• REI: 4 Hrs• Active Ingredient: Phosphorus acid and Hydrogen Peroxide• Rate: 42oz per 100gal• Controls: Pythium

depending on the strength of nutrient mixture and purity of the water source used

This metalized plastic sheeting will reflect about 98% of the light that hits it

and no residue left behind

12_1/2x23_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack X Nutrients bloom • REI: 4 Hrs• ActiveNordic 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