15x24x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack tents-/-indoor-greenhouses pH the solution to the

pH the solution to the proper range for the media being grown in

making it safe for repeated use in the same growing area

RAW GROW is used through out the entire vegetative stage

See dosing chart for target EC mix rates

15x24x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack tents-/-indoor-greenhouses pH the solution to theNordic Pure Custom MERV 8 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