Active Aqua Air Stone, 6" (15 cm), case of 12 dis and it's designed to fit

and it's designed to fit 12-inch carbon filters

It is also screened to remove the majority of the woody and non-decomposed materials

With a patented color comparator system and clear instructions

Bootstrap Farmer's Hoop House Door Kit includes everything needed to install a door and door frame onto a hoop house or caterpillar tunnel

Spray directly on plants during the evening or when lights are off

Active Aqua Air Stone, 6" (15 cm), case of 12 dis and it's designed to fitDescription Active Aqua Air Stones: These are an excellent choice to infuse oxygen into your hydroponic growth system. The unique micropore design energizes the entire growth process as it aerates and circulates nutrients. By choosing to use air stones, you can extend the life of your nutrient solution, keep the roots healthy, and foster exceptional growth. Versatile in Sizes: These air stones come in three convenient sizes from which you can choose.