13 15/16 x 29 15/16 x 3/4 (13.94 x 29.94 x 0.75) Pure Green Eco-Friendly AC Furnace Air Filters 6 Pack food-&-water-storage Bluelab PeriPod M4™ will maintain

Bluelab PeriPod M4™ will maintain stable pH and nutrient levels in your reservoir

• 1-year warranty

2″ L x 5″W x 1

The wand's lightweight aluminum construction allows for reinforced walls

The Checker is the most popular pH meter in the world with over 1 million meters used since its introduction in 1991

13 15/16 x 29 15/16 x 3/4 (13.94 x 29.94 x 0.75) Pure Green Eco-Friendly AC Furnace Air Filters 6 Pack food-&-water-storage Bluelab PeriPod M4™ will maintainPure Green Eco Friendly AC Furnace Air Filters by Nordic Pure are made from an environmentally responsible non woven, high loft, antimicrobial filter media. The MERV 6 rating has a lower pressure drop, minimizing energy consumption while maintaining a high dust holding capacity. As we continue to keep our eyes on media technology advances, our Pure Green media will be changing its appearance. Please expect the same quality and performance you have