Plagron Hydro Correls is a high quality inert, unfertilized hydroponic substrate. It is based on pure salt-free expanded clay, which is baked in an oven until it acquires its characteristic irregular shape.
Plagron Hydro Correls are versatile and suitable for various cultivation methods. They are particularly suitable for recirculating systems due to their high absorption capacity for water and oxygen.
Since the Correls are already pre-washed, they can be used practically as often as desired.
Rinse before first use to remove any expanded clay powder released during transport.
Can be used with all fertilizers.
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