15x23x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems Bluelab pH 7 and Bluelab

Bluelab pH 7 and Bluelab pH 4 Solution Sachets are now included

This simple and easy to use product has multiple vitamins and macronutrients that will show you rather than tell you

When the battery power is running low a low battery indicator is displayed

AzaGuard is an indoor/outdoor

Some competing nutrient lines offer a (16-0-0) formula as a one-part grow fertilizer

15x23x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems Bluelab pH 7 and BluelabNordic 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