LF purple up

Not sure about your area guessing you have already looked for it but I have found that most places sale it. In our area pretty much all LFS have it on the shelf.
 
Skip it. You're much better off simply maintaining Alk/Ca then using it. One of it's ingredients is (uselessly) silica sand.
 
I have a full brand new never been opened bottle of it. It's yours if you are willing to drive to Chandler.
 
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