Add drainage to your hydroponics system with the Geolite pH Neutral Clay Pebbles. These pebbles are made from 100% natural Italian clay and heat-treated for stable, neutral pH levels. The durable clay pebbles offer the ideal environment for beneficial bacteria to grow, strengthening the roots of your plants. These pebbles offer great aeration and drainage, making them 1 of the best growing medias for your indoor hydroponic garden. The Geolite clay pebbles have a unique structure and are able to cover a large surface area. The pebbles are ideal for drip feed, deep water culture and flood and drain systems. The neutral pH pebbles are good for all types of plants and crops. These clay pebbles have a high porosity to provide oxygen to the plants and the high water retention makes the pebbles a valuable water reservoir. The pebbles are made from all-natural ingredients. Grow strong, healthy plants in your hydroponics or aquaponics system with the Geolite pH Neutral Clay Pebbles.