17x29x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Liquid & Weight Measuring All Hanna solution bottles come

All Hanna solution bottles come with a pH vs

giving you more time to tend to your plants

• Compact plugin size—low energy consumption

and it allows the user to select a Day

This is important for knowing when to change the pre-filter for the Merlin Garden Pro

17x29x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Liquid & Weight Measuring All Hanna solution bottles comeNordic Pure Custom MERV 12 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