Hydroleca & Seramis

The best clay pebbles on the market, Gold Label Hydrocorn carries the RHP stamp to guarantee quality for this hydroponic growing medium. Hydrocorn or hydroleca are clay pebbles that have been heated so they expand and become water absorbent - once they've reached saturation point they stop expanding and any excess water is flushed through. The pebbles are designed to have a rough finish so as to t...

Seramis is a growing medium made from clay granules mined in Germany and offers an inert medium that’s impossible to over-water. It is made by taking clay granules from the Westerwald region in Germany, 90% of which are sized between 2-4mm, and then heating them which causes them to expand and become porous. The clay granules are totally inert and provide a pH stable, low-residue medium that...