23x25x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack misc Root Royale Hydro Clay Pebbles

Root Royale Hydro Clay Pebbles are 16-20mm in size

for the last 7-14 days of bloom to allow better ripening and finishing

Also contains non-plant food ingredients

This makes for easier spreading

mycorrhizae and dolomithic limestone to adjust pH

23x25x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack misc Root Royale Hydro Clay PebblesNordic 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