16_1/2x21_5/8x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Strong The TrolMaster pH probes provide

The TrolMaster pH probes provide accurate and reliable monitoring on the pH of the water being monitored by the Aqua-x

It features adjustable set point and elevation levels

Onion Maggot

• 12 inch (300 mm) cuff length extra protection against chemicals

using a dedicated fan pack that is powered by the humidifier itself

16_1/2x21_5/8x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Strong The TrolMaster pH probes provideNordic 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