28x28x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack PH/EC/TDS Meters and Solutions Ideal for mixing stock tanks

Ideal for mixing stock tanks and compatible with all dosing systems

especially with inert media and when using reverse osmosis (RO) water

A step up from basic coconut coir for all your hydroponic growing

and high quality German glass coated aluminum reflectors

Great plants start with great soil

28x28x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack PH/EC/TDS Meters and Solutions Ideal for mixing stock tanksNordic Pure Custom MERV 10 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