Single Hydroponic Substrates

Hydrocorn RHP 8-16mm

Specifically designed to be misshaped and porous - the best inert hydroponic substrate on the market.

Black bag of Gold Label Hydrocorn 50L

Best in Class

Porous pebbles for a healthy micro root system

RHP Certified

The only RHP certified clay pebble in the world.


The porous, uneven structure has a high water capacity and is suitable for all hydroponic systems.

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      RHP and KIWA certified pebbles for a clean and root friendly inert hydroponic substrate.

      Pure Quality

      Our Hydrocorn, commonly called clay pebbles are manufactured from the purest quality clays and then baked in an open furnace ignited with high-grade clean fuels, which guarantees our pebbles have no heavy metals or other contaminants which can be detrimental to plant health and yields. 

      RHP Certification

      We are the only company that carries RHP certification for our clay pebbles, which makes it the professional growers number one choice of inert hydroponic substrate.

      Misshapen and Porous

      The porous structure allows the roots to have a supply of water during low-frequency irrigations, and the misshaped structure gives your root system more structure and stability.

      EN Litres

      Due to the strongly increased international trade, a mandatory European standardized system has been introduced since 2000 (EN-12850 Soil-improvers and growing media - Determination of quantity). The EN volume is measured according to an internationally standardized method, whereby the specific density and humidity are decisive.

      Keep covered, in a dry, well-ventilated space.

      Keep away from direct sunlight.

Single Hydroponic Substrates

Single ingredient substrates that offer extra control.

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