GEOLITE Clay Pebble Grow Media, 10 L

High-Porosity Italian Clay for Demanding Grow Rooms, 10 Liter

This 10 liter bag of GEOLITE clay pebbles is made from Italian clay, kiln-fired and treated for a consistent, low EC and stable, neutral pH.

With high total porosity, the pebbles deliver root ventilation and oxygenation, and their surface area helps foster beneficial bacterial growth around the root zone in drip feed, deep water culture, and flood and drain systems.

Key Features & Benefits

• Kiln-fired Italian clay — produces a durable, long-lasting medium.
• Stable, low EC — keeps nutrient solution consistent batch after batch.
• High porosity — provides strong root ventilation and oxygenation.
• Sized 8-20mm — suits hydroponics, hydroculture, and aquaponic systems.

Who Should Use This Medium

Commercial and home hydroponic growers who want a durable clay medium with consistent quality for drip feed, deep water culture, or flood and drain systems.

About GEOLITE

GEOLITE is a Hydrofarm-owned clay pebble grow media brand, made from Italian-sourced clay and marketed as a pH neutral medium with strong drainage and aeration for hydroponic and aquaponic use.

Frequently Asked Questions

What makes this different from standard clay pebbles?

It is kiln-fired at a high temperature and treated for a more consistent, low EC and stable pH. That processing is what the brand's own listings describe as pH neutral drainage media.

What size are the pebbles?

They are sized between 8mm and 20mm. That range gives a balance of drainage and root anchoring in most containers.

Which systems work best with this medium?

Drip feed, deep water culture, and flood and drain systems all work well. Its high porosity supports the oxygen exchange those recirculating systems depend on.

How porous is this medium?

The pebbles are built for high total porosity, supporting strong root oxygenation. That porosity is what keeps the root zone from becoming waterlogged in flood-and-drain or DWC use.

Do I need to rinse it before first use?

Rinse it first if a fine dust layer is visible on the pebbles. After that, use it as a stand-alone medium or blend it with soil for added aeration and drainage in containers.