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Nothing wrong with linking to another site as long as you are not promoting it.
Marco I don't know the place in question but I had a look anyway.
It seems to be pretty standard biofiltration except it's on a grand scale and fully automated. The one thing that did catch my eye is the fact that he seems to be reducing his hardness by addition of Hydrochloric acid and pure O2.
His DH seems to be around 2 or less . This is pretty knife edge stuff.
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