Growstone? GS-2 Mix Soil Aerator is the ideal aeration component of soil mixes. Its highly porous aggregates act as air pockets significantly enhancing aeration and drainage of an sphagnum peat, coco coir or composted soil-based mix. As a result, it creates the ideal environment for your plants? root systems and leads to healthy, thriving plants. Ideal for growing a wide variety of plants including herbs, flowering and woody ornamentals, vegetables, tropical, trees and scrubs. Growstone? GS-2 Mix This Soil Aerator is a sustainable alternative to perlite and other soil amendments used to improve texture and structure of soil or soilless mixes. 100% Recycled. 100% American made.