What is Rockwool made of, and how does it differ from Gelponics?
Gelponics products are a more environmentally friendly replacement for Rockwool, which tends to have a high carbon footprint and is non-biodegradable. But what is Rockwool made of, and how does Gelponics differ? What is rockwool made of? Rockwool is a lightweight hydroponic substrate made from molten basaltic rock spun into fine fibres. These fine fibres …
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