21x23_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack soil Make access to your greenhouse

Make access to your greenhouse simple and convenient with this time saving product

This rugged and reliable vacuum pump is designed for long life with continuous use

- Reduce the need for fungicides

which contains carefully selected biological stimulants such as amino acids

Grow in hydroponic systems

21x23_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack soil Make access to your greenhouseNordic 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