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Recommended for 100+ gallon reservoirs
They turn dead roots into minerals and sugars
safe to apply on food crops up to one day before harvest
It's not Gravity- it's something MORE
Emerald Goddess contributes additional macronutrients
Air Stone Round 4" Garden Accessories Recommended for 100+ gallon reservoirsActive Aqua air stones are an ideal way to add oxygen to your hydroponic growing system. The micropore design energizes the growing solution as it aerates and circulates nutrients. Air stones will extend the life of your nutrient solution, help keep roots healthy, and promote exceptional growth. Choose from two versatile, round air stone disc sizes. This one is 4" inches.