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Unread 11/13/2016, 10:50 PM   #175
bertoni
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Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 88,616
The sponges might do better with some silicate, but you can make a supplement from waterglass, if you're interested. That's what I did. I could locate the formula fairly quickly, I think.


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Jonathan Bertoni
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