Reduced absorption of water and very even shape creates huge air pockets, designed for the more frequent irrigation systems.
Gold Label Hydro expanded clay pebbles have a solid outer ceramic layer, which limits the uptake of water. They are ideally suited for intense irrigation hydroponic styles of growing.
Even though the pebbles are dense, they can still float in deep flood and drain systems. We recommend to top feed systems for hydro and for flood and drain systems we recommend using our Gold Label Hydrocorn clay pebbles.
High Oxygen Content
Due to the pebbles being round, they have an even shape which leaves much space for air in the root system. The closed, rounded pebble makes it hard for the roots to attach, enabling easy cleaning and re-use of your substrate.
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.