23_1/2x23_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack nutrients and supplements The Master controller EL1 and

The Master controller EL1 and EL2 Gen 2 are our entry-level systems for centrally controlling large rooms with e-series fixtures

This reduces application frequency and risk of nutrient burn

Cups are manufactured in Humboldt County

the product is very light and has excellent physical qualities for use in plant propagation

23_1/2x23_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack nutrients and supplements The Master controller EL1 andNordic Pure Custom MERV 14 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