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Abgeschickt von Michael Weinert am 24 Oktober, 2000 um 18:25:41
Antwort auf: Seramis, vermiculite and other von Defour Octave am 24 Oktober, 2000 um 18:14:37:
I can help you with at least two of the components you mentioned: Seramis is burned clay with open pores (the structure like a sponge), so it is capable of storing high amounts of water. In the opposite the pores of burned clay pebbles used for hydroponic culture are closed and therefore cannot store much water. Isolite seems to be a similar product from USA.
I hope this helps