23_1/4x29_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow media bio-active form known as Monosilicic

bio-active form known as Monosilicic Acid

This nutrient system works well in hydroponics

A 30-liter pail of ONA Gel attaches securely to the bottom of the Carbon-Air unit

It securely holds the 6" FloraCap® allowing anyone to easily transition to the new PotPro™ System

Begin applications before pest populations establish for best results

23_1/4x29_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow media bio-active form known as MonosilicicNordic 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