13x21_3/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack grow media The panels can be used

The panels can be used to conceal empty rack spaces for a uniform rack appearance and also provides rack rail support

There is a metal mesh support grid bonded to the pleats for extra support

When using Light·Mix® we can advise a dose of 2-4 ml per litre water

The Prune Pot Tray Liner is a breathable fabric liner that fits neatly inside your flood trays

Build A Beneficial Insect Population & Maintain A Healthy Garden

13x21_3/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack grow media The panels can be usedNordic 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