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Fertilizer stabilizing

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TimMartin:
I'm working on making a liquid fertilizer using pressed green crabs. Using horticultural a.c. vinagar 1:1.  it seems to be stable at ph of 4.1. However acv is rather expensive scaling up. Tried powdered citric acid and at a ph of 4.1 - 3.8 it separated into a slurry and a week later rancid.Tried 50% citric acid solution  till ph was 4.1 and it seemed to slurry up the same way. Any hints or suggestions greatly appreciated. 

rolnor:
Will this be a calcium fertilizer maninly? The shells from the crabs?

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