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![]() ![]() Grodan - traysGrodan Rockwool has been made in Denmark since 1969. Let us introduce you to Grodan stonewool: Grodan is water absorbent stonewool. Mother Nature makes her own stonewool which is known as angel hair from volcanoes. In the case of Grodan rockwool, rocks are heated up to 3000 degrees Fahrenheit and spun into wool like cotton candy. This method gives a media that is sterile and always maintains its structure as in the case of Grodan rockwool. Product characteristics
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