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Potassium Oxalate developer mixing problem

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Erik L

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Hi Folks,
I was watching one of Bill Schwabs (rest in peace) videos about mixing potassium oxalate developer and I followed his method and ended up with a lot of white sludge which I’m assuming is oxalic acid that didn’t go into solution.
His recipe was for 1 liter add 200 grams potassium carbonate until dissolved then slowly while stirring add 230 grams of oxalic acid. After all the fizzing was over I have quite a bit of sludge that didn’t go into solution. I’ve done this before with different recipes I believe and didn’t have that problem. Do I just filter out the sludge or do I add more potassium carbonate until dissolved? Or do I start over with a different recipe? Thanks for any help!
 
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