What is everyone using for their msa? I have a res as im using autopots and im almost out of my alchemist stout. Hard to get more of it i got my last bottle on amazon and currently cant get it.
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MSA??? 
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I have used Success Nutrients Silica and Advanced Nutrients Rhino Skin.
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Ive used rhino skin as qell when i was using AN but thats not msa i think its potassium silicate
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