Grodan 6 cubes, 4" cube with large hole

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Grodan 6 cubes, 4" cube with large hole

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6 cube strip Grodan, 4" cube w/ large hole

It is back to Nature. The raw material is basalt rocks and chalk. These are melted at 1600 C°. The lava is blown into a spinning chamber, which pulls the lava into fibers, much like "candy floss". When Mother nature makes this wool we call it ‘angel hair’.
We pack the fibers together into a mat and cut Grodan slabs & cubes from it.

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Grodan stonewool was developed in Denmark in the early 1970's.The process makes excellent use of nature resources; We can produce 37 cu.ft. of wool from 1 cu. ft. of rocks.

Today most Grodan is pro-duced from recycled Grodan.

Grodan stonewool is the main reason that most of the worlds greenhouse vegetables are now grown hydroponically.

At full saturation, Grodan holds 80-90% of its volume in water. It is wrapped in biodegradable plastic and the stonewool can be re-used in your garden to improve the aeration and water holding capacity.

Grodan stonewool went into space on Challenger in 1986 and is still being used in NASA's testing with hydroponics.

You will also find Grodan products at the EPCOT center / Walt Disney in Florida

You will find Grodan stonewool in some garden centres and in virtually all hydroponics shops around the world

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