Souring with lactic acid

I’ve had trouble making time to brew lately. Tomorrow I have a gose planned and unfortunately didn’t get my lacto culture going in time. I’m going to just add lactic acid post fermentation. What’s a good starting point? I read 2-3 oz of 88% in a zymurgy article I’m thinking of adding a small amount of citric acid as well

Do you have access to Goodbelly? Quick and easy, two shots per 5 gallons.

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