28x34x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow-systems-trays-reservoirs Our filter media prevents the

Our filter media prevents the growth of bacteria or mold

Nutrient Line Beta is also designed to allow plants to easily absorb everything needed within a wide pH range

Repeat on each of the mounds

【Sosen Driver】200W Sosen Driver helps achieve high PAR output and longer lifespan

Dimensions: 20

28x34x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow-systems-trays-reservoirs Our filter media prevents theNordic 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